diff --git a/src/com/android/phone/common/mail/AuthenticationFailedException.java b/src/com/android/phone/common/mail/AuthenticationFailedException.java
deleted file mode 100644
index f13ab45..0000000
--- a/src/com/android/phone/common/mail/AuthenticationFailedException.java
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail;
-
-public class AuthenticationFailedException extends MessagingException {
-    public static final long serialVersionUID = -1;
-
-    public AuthenticationFailedException(String message) {
-        super(MessagingException.AUTHENTICATION_FAILED, message);
-    }
-
-    public AuthenticationFailedException(int exceptionType, String message) {
-        super(exceptionType, message);
-    }
-
-    public AuthenticationFailedException(String message, Throwable throwable) {
-        super(MessagingException.AUTHENTICATION_FAILED, message, throwable);
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/CertificateValidationException.java b/src/com/android/phone/common/mail/CertificateValidationException.java
deleted file mode 100644
index d8ae9b4..0000000
--- a/src/com/android/phone/common/mail/CertificateValidationException.java
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail;
-
-public class CertificateValidationException extends MessagingException {
-    public static final long serialVersionUID = -1;
-
-    public CertificateValidationException(String message) {
-        super(MessagingException.CERTIFICATE_VALIDATION_ERROR, message);
-    }
-
-    public CertificateValidationException(String message, Throwable throwable) {
-        super(MessagingException.CERTIFICATE_VALIDATION_ERROR, message, throwable);
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/FixedLengthInputStream.java b/src/com/android/phone/common/mail/FixedLengthInputStream.java
deleted file mode 100644
index 499feca..0000000
--- a/src/com/android/phone/common/mail/FixedLengthInputStream.java
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.phone.common.mail;
-
-import java.io.IOException;
-import java.io.InputStream;
-
-/**
- * A filtering InputStream that stops allowing reads after the given length has been read. This
- * is used to allow a client to read directly from an underlying protocol stream without reading
- * past where the protocol handler intended the client to read.
- */
-public class FixedLengthInputStream extends InputStream {
-    private final InputStream mIn;
-    private final int mLength;
-    private int mCount;
-
-    public FixedLengthInputStream(InputStream in, int length) {
-        this.mIn = in;
-        this.mLength = length;
-    }
-
-    @Override
-    public int available() throws IOException {
-        return mLength - mCount;
-    }
-
-    @Override
-    public int read() throws IOException {
-        if (mCount < mLength) {
-            mCount++;
-            return mIn.read();
-        } else {
-            return -1;
-        }
-    }
-
-    @Override
-    public int read(byte[] b, int offset, int length) throws IOException {
-        if (mCount < mLength) {
-            int d = mIn.read(b, offset, Math.min(mLength - mCount, length));
-            if (d == -1) {
-                return -1;
-            } else {
-                mCount += d;
-                return d;
-            }
-        } else {
-            return -1;
-        }
-    }
-
-    @Override
-    public int read(byte[] b) throws IOException {
-        return read(b, 0, b.length);
-    }
-
-    public int getLength() {
-        return mLength;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("FixedLengthInputStream(in=%s, length=%d)", mIn.toString(), mLength);
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/MailTransport.java b/src/com/android/phone/common/mail/MailTransport.java
deleted file mode 100644
index 5e3f7f5..0000000
--- a/src/com/android/phone/common/mail/MailTransport.java
+++ /dev/null
@@ -1,247 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.phone.common.mail;
-
-import android.content.Context;
-import android.util.Log;
-
-import com.android.phone.common.mail.store.ImapStore;
-
-import java.net.SocketAddress;
-
-import javax.net.ssl.HostnameVerifier;
-import javax.net.ssl.HttpsURLConnection;
-import javax.net.ssl.SSLException;
-import javax.net.ssl.SSLPeerUnverifiedException;
-import javax.net.ssl.SSLSession;
-import javax.net.ssl.SSLSocket;
-
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.net.InetSocketAddress;
-import java.net.Socket;
-
-/**
- * Make connection and perform operations on mail server by reading and writing lines.
- */
-public class MailTransport {
-    private static final String TAG = "MailTransport";
-
-    // TODO protected eventually
-    /*protected*/ public static final int SOCKET_CONNECT_TIMEOUT = 10000;
-    /*protected*/ public static final int SOCKET_READ_TIMEOUT = 60000;
-
-    private static final HostnameVerifier HOSTNAME_VERIFIER =
-            HttpsURLConnection.getDefaultHostnameVerifier();
-
-    private Context mContext;
-    private String mHost;
-    private int mPort;
-    private Socket mSocket;
-    private BufferedInputStream mIn;
-    private BufferedOutputStream mOut;
-    private int mFlags;
-
-    public MailTransport(Context context, String address, int port, int flags) {
-        mContext = context;
-        mHost = address;
-        mPort = port;
-        mFlags = flags;
-    }
-
-    /**
-     * Returns a new transport, using the current transport as a model. The new transport is
-     * configured identically, but not opened or connected in any way.
-     */
-    @Override
-    public MailTransport clone() {
-        return new MailTransport(mContext, mHost, mPort, mFlags);
-    }
-
-    public boolean canTrySslSecurity() {
-        return (mFlags & ImapStore.FLAG_SSL) != 0;
-    }
-
-    public boolean canTrustAllCertificates() {
-        return (mFlags & ImapStore.FLAG_TRUST_ALL) != 0;
-    }
-
-    /**
-     * Attempts to open a connection using the Uri supplied for connection parameters.  Will attempt
-     * an SSL connection if indicated.
-     */
-    public void open() throws MessagingException, CertificateValidationException {
-        if (Log.isLoggable(TAG, Log.DEBUG)) {
-            Log.d(TAG, "*** IMAP open " + mHost + ":" + String.valueOf(mPort));
-        }
-
-        try {
-            SocketAddress socketAddress = new InetSocketAddress(mHost, mPort);
-            if (canTrySslSecurity()) {
-                mSocket = HttpsURLConnection.getDefaultSSLSocketFactory().createSocket();
-            } else {
-                mSocket = new Socket();
-            }
-            mSocket.connect(socketAddress, SOCKET_CONNECT_TIMEOUT);
-            // After the socket connects to an SSL server, confirm that the hostname is as expected
-            if (canTrySslSecurity() && !canTrustAllCertificates()) {
-                verifyHostname(mSocket, mHost);
-            }
-
-            mIn = new BufferedInputStream(mSocket.getInputStream(), 1024);
-            mOut = new BufferedOutputStream(mSocket.getOutputStream(), 512);
-            mSocket.setSoTimeout(SOCKET_READ_TIMEOUT);
-        } catch (SSLException e) {
-            if (Log.isLoggable(TAG, Log.DEBUG)) {
-                Log.d(TAG, e.toString());
-            }
-            throw new CertificateValidationException(e.getMessage(), e);
-        } catch (IOException ioe) {
-            if (Log.isLoggable(TAG, Log.DEBUG)) {
-                Log.d(TAG, ioe.toString());
-            }
-            throw new MessagingException(MessagingException.IOERROR, ioe.toString());
-        } catch (IllegalArgumentException iae) {
-            if (Log.isLoggable(TAG, Log.DEBUG)) {
-                Log.d(TAG, iae.toString());
-            }
-            throw new MessagingException(MessagingException.UNSPECIFIED_EXCEPTION, iae.toString());
-        }
-    }
-
-    /**
-     * Lightweight version of SSLCertificateSocketFactory.verifyHostname, which provides this
-     * service but is not in the public API.
-     *
-     * Verify the hostname of the certificate used by the other end of a
-     * connected socket. It is harmless to call this method redundantly if the hostname has already
-     * been verified.
-     *
-     * <p>Wildcard certificates are allowed to verify any matching hostname,
-     * so "foo.bar.example.com" is verified if the peer has a certificate
-     * for "*.example.com".
-     *
-     * @param socket An SSL socket which has been connected to a server
-     * @param hostname The expected hostname of the remote server
-     * @throws IOException if something goes wrong handshaking with the server
-     * @throws SSLPeerUnverifiedException if the server cannot prove its identity
-      */
-    private static void verifyHostname(Socket socket, String hostname) throws IOException {
-        // The code at the start of OpenSSLSocketImpl.startHandshake()
-        // ensures that the call is idempotent, so we can safely call it.
-        SSLSocket ssl = (SSLSocket) socket;
-        ssl.startHandshake();
-
-        SSLSession session = ssl.getSession();
-        if (session == null) {
-            throw new SSLException("Cannot verify SSL socket without session");
-        }
-        // TODO: Instead of reporting the name of the server we think we're connecting to,
-        // we should be reporting the bad name in the certificate.  Unfortunately this is buried
-        // in the verifier code and is not available in the verifier API, and extracting the
-        // CN & alts is beyond the scope of this patch.
-        if (!HOSTNAME_VERIFIER.verify(hostname, session)) {
-            throw new SSLPeerUnverifiedException(
-                    "Certificate hostname not useable for server: " + hostname);
-        }
-    }
-
-    public boolean isOpen() {
-        return (mIn != null && mOut != null &&
-                mSocket != null && mSocket.isConnected() && !mSocket.isClosed());
-    }
-
-    /**
-     * Close the connection.  MUST NOT return any exceptions - must be "best effort" and safe.
-     */
-    public void close() {
-        try {
-            mIn.close();
-        } catch (Exception e) {
-            // May fail if the connection is already closed.
-        }
-        try {
-            mOut.close();
-        } catch (Exception e) {
-            // May fail if the connection is already closed.
-        }
-        try {
-            mSocket.close();
-        } catch (Exception e) {
-            // May fail if the connection is already closed.
-        }
-        mIn = null;
-        mOut = null;
-        mSocket = null;
-    }
-
-    public InputStream getInputStream() {
-        return mIn;
-    }
-
-    public OutputStream getOutputStream() {
-        return mOut;
-    }
-
-    /**
-     * Writes a single line to the server using \r\n termination.
-     */
-    public void writeLine(String s, String sensitiveReplacement) throws IOException {
-        if (Log.isLoggable(TAG, Log.DEBUG)) {
-            if (sensitiveReplacement != null) {
-                Log.d(TAG, ">>> " + sensitiveReplacement);
-            } else {
-                Log.d(TAG, ">>> " + s);
-            }
-        }
-
-        OutputStream out = getOutputStream();
-        out.write(s.getBytes());
-        out.write('\r');
-        out.write('\n');
-        out.flush();
-    }
-
-    /**
-     * Reads a single line from the server, using either \r\n or \n as the delimiter.  The
-     * delimiter char(s) are not included in the result.
-     */
-    public String readLine(boolean loggable) throws IOException {
-        StringBuffer sb = new StringBuffer();
-        InputStream in = getInputStream();
-        int d;
-        while ((d = in.read()) != -1) {
-            if (((char)d) == '\r') {
-                continue;
-            } else if (((char)d) == '\n') {
-                break;
-            } else {
-                sb.append((char)d);
-            }
-        }
-        if (d == -1 && Log.isLoggable(TAG, Log.DEBUG)) {
-            Log.d(TAG, "End of stream reached while trying to read line.");
-        }
-        String ret = sb.toString();
-        if (loggable && Log.isLoggable(TAG, Log.DEBUG)) {
-            Log.d(TAG, "<<< " + ret);
-        }
-        return ret;
-    }
-}
diff --git a/src/com/android/phone/common/mail/Message.java b/src/com/android/phone/common/mail/Message.java
deleted file mode 100644
index cd5a44d..0000000
--- a/src/com/android/phone/common/mail/Message.java
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.phone.common.mail;
-
-/**
- * Object to represent an email message.
- */
-public class Message {
-    public static final String FLAG_SEEN = "seen";
-    public static final String FLAG_DELETED = "deleted";
-}
diff --git a/src/com/android/phone/common/mail/MessagingException.java b/src/com/android/phone/common/mail/MessagingException.java
deleted file mode 100644
index e4c674a..0000000
--- a/src/com/android/phone/common/mail/MessagingException.java
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail;
-
-/**
- * This exception is used for most types of failures that occur during server interactions.
- *
- * Data passed through this exception should be considered non-localized.  Any strings should
- * either be internal-only (for debugging) or server-generated.
- *
- * TO DO: Does it make sense to further collapse AuthenticationFailedException and
- * CertificateValidationException and any others into this?
- */
-public class MessagingException extends Exception {
-    public static final long serialVersionUID = -1;
-
-    public static final int NO_ERROR = -1;
-    /** Any exception that does not specify a specific issue */
-    public static final int UNSPECIFIED_EXCEPTION = 0;
-    /** Connection or IO errors */
-    public static final int IOERROR = 1;
-    /** The configuration requested TLS but the server did not support it. */
-    public static final int TLS_REQUIRED = 2;
-    /** Authentication is required but the server did not support it. */
-    public static final int AUTH_REQUIRED = 3;
-    /** General security failures */
-    public static final int GENERAL_SECURITY = 4;
-    /** Authentication failed */
-    public static final int AUTHENTICATION_FAILED = 5;
-    /** Attempt to create duplicate account */
-    public static final int DUPLICATE_ACCOUNT = 6;
-    /** Required security policies reported - advisory only */
-    public static final int SECURITY_POLICIES_REQUIRED = 7;
-   /** Required security policies not supported */
-    public static final int SECURITY_POLICIES_UNSUPPORTED = 8;
-   /** The protocol (or protocol version) isn't supported */
-    public static final int PROTOCOL_VERSION_UNSUPPORTED = 9;
-    /** The server's SSL certificate couldn't be validated */
-    public static final int CERTIFICATE_VALIDATION_ERROR = 10;
-    /** Authentication failed during autodiscover */
-    public static final int AUTODISCOVER_AUTHENTICATION_FAILED = 11;
-    /** Autodiscover completed with a result (non-error) */
-    public static final int AUTODISCOVER_AUTHENTICATION_RESULT = 12;
-    /** Ambiguous failure; server error or bad credentials */
-    public static final int AUTHENTICATION_FAILED_OR_SERVER_ERROR = 13;
-    /** The server refused access */
-    public static final int ACCESS_DENIED = 14;
-    /** The server refused access */
-    public static final int ATTACHMENT_NOT_FOUND = 15;
-    /** A client SSL certificate is required for connections to the server */
-    public static final int CLIENT_CERTIFICATE_REQUIRED = 16;
-    /** The client SSL certificate specified is invalid */
-    public static final int CLIENT_CERTIFICATE_ERROR = 17;
-    /** The server indicates it does not support OAuth authentication */
-    public static final int OAUTH_NOT_SUPPORTED = 18;
-    /** The server indicates it experienced an internal error */
-    public static final int SERVER_ERROR = 19;
-
-    protected int mExceptionType;
-    // Exception type-specific data
-    protected Object mExceptionData;
-
-    public MessagingException(String message, Throwable throwable) {
-        this(UNSPECIFIED_EXCEPTION, message, throwable);
-    }
-
-    public MessagingException(int exceptionType, String message, Throwable throwable) {
-        super(message, throwable);
-        mExceptionType = exceptionType;
-        mExceptionData = null;
-    }
-
-    /**
-     * Constructs a MessagingException with an exceptionType and a null message.
-     * @param exceptionType The exception type to set for this exception.
-     */
-    public MessagingException(int exceptionType) {
-        this(exceptionType, null, null);
-    }
-
-    /**
-     * Constructs a MessagingException with a message.
-     * @param message the message for this exception
-     */
-    public MessagingException(String message) {
-        this(UNSPECIFIED_EXCEPTION, message, null);
-    }
-
-    /**
-     * Constructs a MessagingException with an exceptionType and a message.
-     * @param exceptionType The exception type to set for this exception.
-     */
-    public MessagingException(int exceptionType, String message) {
-        this(exceptionType, message, null);
-    }
-
-    /**
-     * Constructs a MessagingException with an exceptionType, a message, and data
-     * @param exceptionType The exception type to set for this exception.
-     * @param message the message for the exception (or null)
-     * @param data exception-type specific data for the exception (or null)
-     */
-    public MessagingException(int exceptionType, String message, Object data) {
-        super(message);
-        mExceptionType = exceptionType;
-        mExceptionData = data;
-    }
-
-    /**
-     * Return the exception type.  Will be OTHER_EXCEPTION if not explicitly set.
-     *
-     * @return Returns the exception type.
-     */
-    public int getExceptionType() {
-        return mExceptionType;
-    }
-    /**
-     * Return the exception data.  Will be null if not explicitly set.
-     *
-     * @return Returns the exception data.
-     */
-    public Object getExceptionData() {
-        return mExceptionData;
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/PeekableInputStream.java b/src/com/android/phone/common/mail/PeekableInputStream.java
deleted file mode 100644
index d29fc6b..0000000
--- a/src/com/android/phone/common/mail/PeekableInputStream.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail;
-
-import java.io.IOException;
-import java.io.InputStream;
-
-/**
- * A filtering InputStream that allows single byte "peeks" without consuming the byte. The
- * client of this stream can call peek() to see the next available byte in the stream
- * and a subsequent read will still return the peeked byte.
- */
-public class PeekableInputStream extends InputStream {
-    private final InputStream mIn;
-    private boolean mPeeked;
-    private int mPeekedByte;
-
-    public PeekableInputStream(InputStream in) {
-        this.mIn = in;
-    }
-
-    @Override
-    public int read() throws IOException {
-        if (!mPeeked) {
-            return mIn.read();
-        } else {
-            mPeeked = false;
-            return mPeekedByte;
-        }
-    }
-
-    public int peek() throws IOException {
-        if (!mPeeked) {
-            mPeekedByte = read();
-            mPeeked = true;
-        }
-        return mPeekedByte;
-    }
-
-    @Override
-    public int read(byte[] b, int offset, int length) throws IOException {
-        if (!mPeeked) {
-            return mIn.read(b, offset, length);
-        } else {
-            b[0] = (byte)mPeekedByte;
-            mPeeked = false;
-            int r = mIn.read(b, offset + 1, length - 1);
-            if (r == -1) {
-                return 1;
-            } else {
-                return r + 1;
-            }
-        }
-    }
-
-    @Override
-    public int read(byte[] b) throws IOException {
-        return read(b, 0, b.length);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PeekableInputStream(in=%s, peeked=%b, peekedByte=%d)",
-                mIn.toString(), mPeeked, mPeekedByte);
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/ImapConnection.java b/src/com/android/phone/common/mail/store/ImapConnection.java
deleted file mode 100644
index 3cae5f8..0000000
--- a/src/com/android/phone/common/mail/store/ImapConnection.java
+++ /dev/null
@@ -1,248 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.phone.common.mail.store;
-
-import android.text.TextUtils;
-import android.util.Log;
-
-import com.android.phone.common.mail.AuthenticationFailedException;
-import com.android.phone.common.mail.CertificateValidationException;
-import com.android.phone.common.mail.MailTransport;
-import com.android.phone.common.mail.MessagingException;
-import com.android.phone.common.mail.store.imap.ImapConstants;
-import com.android.phone.common.mail.store.imap.ImapResponse;
-import com.android.phone.common.mail.store.imap.ImapResponseParser;
-import com.android.phone.common.mail.store.imap.ImapUtility;
-import com.android.phone.common.mail.store.ImapStore.ImapException;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.concurrent.atomic.AtomicInteger;
-
-import javax.net.ssl.SSLException;
-
-/**
- * A cacheable class that stores the details for a single IMAP connection.
- */
-public class ImapConnection {
-    private final String TAG = "ImapConnection";
-
-    private String mLoginPhrase;
-    private ImapStore mImapStore;
-    private MailTransport mTransport;
-    private ImapResponseParser mParser;
-
-    static final String IMAP_REDACTED_LOG = "[IMAP command redacted]";
-
-    /**
-     * Next tag to use.  All connections associated to the same ImapStore instance share the same
-     * counter to make tests simpler.
-     * (Some of the tests involve multiple connections but only have a single counter to track the
-     * tag.)
-     */
-    private final AtomicInteger mNextCommandTag = new AtomicInteger(0);
-
-    ImapConnection(ImapStore store) {
-        setStore(store);
-    }
-
-    void setStore(ImapStore store) {
-        // TODO: maybe we should throw an exception if the connection is not closed here,
-        // if it's not currently closed, then we won't reopen it, so if the credentials have
-        // changed, the connection will not be reestablished.
-        mImapStore = store;
-        mLoginPhrase = null;
-    }
-
-    /**
-     * Generates and returns the phrase to be used for authentication. This will be a LOGIN with
-     * username and password.
-     *
-     * @return the login command string to sent to the IMAP server
-     */
-    String getLoginPhrase() {
-        if (mLoginPhrase == null) {
-            if (mImapStore.getUsername() != null && mImapStore.getPassword() != null) {
-                // build the LOGIN string once (instead of over-and-over again.)
-                // apply the quoting here around the built-up password
-                mLoginPhrase = ImapConstants.LOGIN + " " + mImapStore.getUsername() + " "
-                        + ImapUtility.imapQuoted(mImapStore.getPassword());
-            }
-        }
-        return mLoginPhrase;
-    }
-
-    void open() throws IOException, MessagingException {
-        if (mTransport != null && mTransport.isOpen()) {
-            return;
-        }
-
-        try {
-            // copy configuration into a clean transport, if necessary
-            if (mTransport == null) {
-                mTransport = mImapStore.cloneTransport();
-            }
-
-            mTransport.open();
-
-            createParser();
-
-            // LOGIN
-            doLogin();
-        } catch (SSLException e) {
-            if (Log.isLoggable(TAG, Log.DEBUG)) {
-                Log.d(TAG, "SSLException ", e);
-            }
-            throw new CertificateValidationException(e.getMessage(), e);
-        } catch (IOException ioe) {
-            if (Log.isLoggable(TAG, Log.DEBUG)) {
-                Log.d(TAG, "IOException", ioe);
-            }
-            throw ioe;
-        } finally {
-            destroyResponses();
-        }
-    }
-
-    /**
-     * Closes the connection and releases all resources. This connection can not be used again
-     * until {@link #setStore(ImapStore)} is called.
-     */
-    void close() {
-        if (mTransport != null) {
-            mTransport.close();
-            mTransport = null;
-        }
-        destroyResponses();
-        mParser = null;
-        mImapStore = null;
-    }
-
-    /**
-     * Logs into the IMAP server
-     */
-    private void doLogin() throws IOException, MessagingException, AuthenticationFailedException {
-        try {
-            executeSimpleCommand(getLoginPhrase(), true);
-        } catch (ImapException ie) {
-            if (Log.isLoggable(TAG, Log.DEBUG)) {
-                Log.d(TAG, "ImapException", ie);
-            }
-            final String status = ie.getStatus();
-            final String code = ie.getResponseCode();
-            final String alertText = ie.getAlertText();
-
-            // if the response code indicates expired or bad credentials, throw a special exception
-            if (ImapConstants.AUTHENTICATIONFAILED.equals(code) ||
-                    ImapConstants.EXPIRED.equals(code) ||
-                    (ImapConstants.NO.equals(status) && TextUtils.isEmpty(code))) {
-                throw new AuthenticationFailedException(alertText, ie);
-            }
-
-            throw new MessagingException(alertText, ie);
-        }
-    }
-
-    /**
-     * Create an {@link ImapResponseParser} from {@code mTransport.getInputStream()} and
-     * set it to {@link #mParser}.
-     *
-     * If we already have an {@link ImapResponseParser}, we
-     * {@link #destroyResponses()} and throw it away.
-     */
-    private void createParser() {
-        destroyResponses();
-        mParser = new ImapResponseParser(mTransport.getInputStream());
-    }
-
-
-    void destroyResponses() {
-        if (mParser != null) {
-            mParser.destroyResponses();
-        }
-    }
-
-    List<ImapResponse> executeSimpleCommand(String command)
-            throws IOException, MessagingException{
-        return executeSimpleCommand(command, false);
-    }
-
-    /**
-     * Send a single command to the server.  The command will be preceded by an IMAP command
-     * tag and followed by \r\n (caller need not supply them).
-     * Execute a simple command at the server, a simple command being one that is sent in a single
-     * line of text
-     *
-     * @param command the command to send to the server
-     * @param sensitive whether the command should be redacted in logs (used for login)
-     * @return a list of ImapResponses
-     * @throws IOException
-     * @throws MessagingException
-     */
-    List<ImapResponse> executeSimpleCommand(String command, boolean sensitive)
-            throws IOException, MessagingException {
-        // TODO: It may be nice to catch IOExceptions and close the connection here.
-        // Currently, we expect callers to do that, but if they fail to we'll be in a broken state.
-        sendCommand(command, sensitive);
-        return getCommandResponses();
-    }
-
-    String sendCommand(String command, boolean sensitive) throws IOException, MessagingException {
-        open();
-
-        if (mTransport == null) {
-            throw new IOException("Null transport");
-        }
-        String tag = Integer.toString(mNextCommandTag.incrementAndGet());
-        String commandToSend = tag + " " + command;
-        mTransport.writeLine(commandToSend, (sensitive ? IMAP_REDACTED_LOG : command));
-
-        return tag;
-    }
-
-    /**
-     * Read and return all of the responses from the most recent command sent to the server
-     *
-     * @return a list of ImapResponses
-     * @throws IOException
-     * @throws MessagingException
-     */
-    List<ImapResponse> getCommandResponses() throws IOException, MessagingException {
-        final List<ImapResponse> responses = new ArrayList<ImapResponse>();
-        ImapResponse response;
-        do {
-            response = mParser.readResponse();
-            responses.add(response);
-        } while (!response.isTagged());
-
-        if (!response.isOk()) {
-            final String toString = response.toString();
-            final String status = response.getStatusOrEmpty().getString();
-            final String alert = response.getAlertTextOrEmpty().getString();
-            final String responseCode = response.getResponseCodeOrEmpty().getString();
-            destroyResponses();
-
-            // if the response code indicates an error occurred within the server, indicate that
-            if (ImapConstants.UNAVAILABLE.equals(responseCode)) {
-                throw new MessagingException(MessagingException.SERVER_ERROR, alert);
-            }
-
-            throw new ImapException(toString, status, alert, responseCode);
-        }
-        return responses;
-    }
-}
diff --git a/src/com/android/phone/common/mail/store/ImapFolder.java b/src/com/android/phone/common/mail/store/ImapFolder.java
deleted file mode 100644
index 9f7db4a..0000000
--- a/src/com/android/phone/common/mail/store/ImapFolder.java
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.phone.common.mail.store;
-
-import android.util.Log;
-
-import com.android.phone.common.mail.AuthenticationFailedException;
-import com.android.phone.common.mail.MessagingException;
-import com.android.phone.common.mail.store.imap.ImapConstants;
-import com.android.phone.common.mail.store.imap.ImapResponse;
-import com.android.phone.common.mail.store.imap.ImapString;
-
-import java.io.IOException;
-import java.util.List;
-import java.util.Locale;
-
-/**
- * Represents one folder on the IMAP server.
- */
-public class ImapFolder {
-    private final String TAG = "ImapFolder";
-    private ImapStore mStore;
-    private String mName;
-    private String mMode;
-    private boolean mExists;
-    private ImapConnection mConnection;
-    private int mMessageCount;
-
-    public static final String MODE_READ_ONLY = "mode_read_only";
-    public static final String MODE_READ_WRITE = "mode_read_write";
-
-    public ImapFolder(ImapStore store, String name) {
-        mStore = store;
-        mName = name;
-    }
-
-    private void destroyResponses() {
-        if (mConnection != null) {
-            mConnection.destroyResponses();
-        }
-    }
-
-    public void open(String mode)
-            throws MessagingException {
-        try {
-            if (isOpen()) {
-                if (mMode == mode) {
-                    // Make sure the connection is valid.
-                    // If it's not we'll close it down and continue on to get a new one.
-                    try {
-                        mConnection.executeSimpleCommand(ImapConstants.NOOP);
-                        return;
-
-                    } catch (IOException ioe) {
-                        ioExceptionHandler(mConnection, ioe);
-                    } finally {
-                        destroyResponses();
-                    }
-                } else {
-                    // Return the connection to the pool, if exists.
-                    close(false);
-                }
-            }
-            synchronized (this) {
-                mConnection = mStore.getConnection();
-            }
-            // * FLAGS (\Answered \Flagged \Deleted \Seen \Draft NonJunk
-            // $MDNSent)
-            // * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft
-            // NonJunk $MDNSent \*)] Flags permitted.
-            // * 23 EXISTS
-            // * 0 RECENT
-            // * OK [UIDVALIDITY 1125022061] UIDs valid
-            // * OK [UIDNEXT 57576] Predicted next UID
-            // 2 OK [READ-WRITE] Select completed.
-            try {
-                doSelect();
-            } catch (IOException ioe) {
-                throw ioExceptionHandler(mConnection, ioe);
-            } finally {
-                destroyResponses();
-            }
-        } catch (AuthenticationFailedException e) {
-            // Don't cache this connection, so we're forced to try connecting/login again
-            mConnection = null;
-            close(false);
-            throw e;
-        } catch (MessagingException e) {
-            mExists = false;
-            close(false);
-            throw e;
-        }
-    }
-
-    public boolean isOpen() {
-        return mExists && mConnection != null;
-    }
-
-    /**
-     * Selects the folder for use. Before performing any operations on this folder, it
-     * must be selected.
-     */
-    private void doSelect() throws IOException, MessagingException {
-        final List<ImapResponse> responses = mConnection.executeSimpleCommand(
-                String.format(Locale.US, ImapConstants.SELECT + " \"%s\"", mName));
-
-        // Assume the folder is opened read-write; unless we are notified otherwise
-        mMode = MODE_READ_WRITE;
-        int messageCount = -1;
-        for (ImapResponse response : responses) {
-            if (response.isDataResponse(1, ImapConstants.EXISTS)) {
-                messageCount = response.getStringOrEmpty(0).getNumberOrZero();
-            } else if (response.isOk()) {
-                final ImapString responseCode = response.getResponseCodeOrEmpty();
-                if (responseCode.is(ImapConstants.READ_ONLY)) {
-                    mMode = MODE_READ_ONLY;
-                } else if (responseCode.is(ImapConstants.READ_WRITE)) {
-                    mMode = MODE_READ_WRITE;
-                }
-            } else if (response.isTagged()) { // Not OK
-                throw new MessagingException("Can't open mailbox: "
-                        + response.getStatusResponseTextOrEmpty());
-            }
-        }
-        if (messageCount == -1) {
-            throw new MessagingException("Did not find message count during select");
-        }
-        mMessageCount = messageCount;
-        mExists = true;
-    }
-
-    public void close(boolean expunge) {
-        // TODO implement expunge
-        mMessageCount = -1;
-        synchronized (this) {
-            mStore.closeConnection();
-            mConnection = null;
-        }
-    }
-
-    private MessagingException ioExceptionHandler(ImapConnection connection, IOException ioe) {
-        if (Log.isLoggable(TAG, Log.DEBUG)) {
-            Log.d(TAG, "IO Exception detected: ", ioe);
-        }
-        connection.close();
-        if (connection == mConnection) {
-            mConnection = null; // To prevent close() from returning the connection to the pool.
-            close(false);
-        }
-        return new MessagingException(MessagingException.IOERROR, "IO Error", ioe);
-    }
-}
diff --git a/src/com/android/phone/common/mail/store/ImapStore.java b/src/com/android/phone/common/mail/store/ImapStore.java
deleted file mode 100644
index 38bb62f..0000000
--- a/src/com/android/phone/common/mail/store/ImapStore.java
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store;
-
-import android.content.Context;
-
-import com.android.phone.common.mail.MailTransport;
-import com.android.phone.common.mail.MessagingException;
-import com.android.phone.common.mail.store.ImapFolder;
-
-public class ImapStore {
-    /**
-     * A global suggestion to Store implementors on how much of the body
-     * should be returned on FetchProfile.Item.BODY_SANE requests. We'll use 125k now.
-     */
-    public static final int FETCH_BODY_SANE_SUGGESTED_SIZE = (125 * 1024);
-    private Context mContext;
-    private String mUsername;
-    private String mPassword;
-    private MailTransport mTransport;
-    private ImapConnection mConnection;
-
-    public static final int FLAG_NONE         = 0x00;    // No flags
-    public static final int FLAG_SSL          = 0x01;    // Use SSL
-    public static final int FLAG_TLS          = 0x02;    // Use TLS
-    public static final int FLAG_AUTHENTICATE = 0x04;    // Use name/password for authentication
-    public static final int FLAG_TRUST_ALL    = 0x08;    // Trust all certificates
-    public static final int FLAG_OAUTH        = 0x10;    // Use OAuth for authentication
-
-    /**
-     * Contains all the information necessary to log into an imap server
-     */
-    public ImapStore(Context context, String username, String password, int port,
-            String serverName, int flags) {
-        mContext = context;
-        mUsername = username;
-        mPassword = password;
-        mTransport = new MailTransport(context, serverName, port, flags);
-    }
-
-    public ImapFolder getFolder(String name) {
-        return new ImapFolder(this, name);
-    }
-
-    public String getUsername() {
-        return mUsername;
-    }
-
-    public String getPassword() {
-        return mPassword;
-    }
-
-    /** Returns a clone of the transport associated with this store. */
-    MailTransport cloneTransport() {
-        return mTransport.clone();
-    }
-
-    static class ImapException extends MessagingException {
-        private static final long serialVersionUID = 1L;
-
-        private final String mStatus;
-        private final String mAlertText;
-        private final String mResponseCode;
-
-        public ImapException(String message, String status, String alertText,
-                String responseCode) {
-            super(message);
-            mStatus = status;
-            mAlertText = alertText;
-            mResponseCode = responseCode;
-        }
-
-        public String getStatus() {
-            return mStatus;
-        }
-
-        public String getAlertText() {
-            return mAlertText;
-        }
-
-        public String getResponseCode() {
-            return mResponseCode;
-        }
-    }
-
-    public void closeConnection() {
-        if (mConnection != null) {
-            mConnection.close();
-            mConnection = null;
-        }
-    }
-
-    public ImapConnection getConnection() {
-        if (mConnection == null) {
-            mConnection = new ImapConnection(this);
-        }
-        return mConnection;
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapConstants.java b/src/com/android/phone/common/mail/store/imap/ImapConstants.java
deleted file mode 100644
index 0f1f526..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapConstants.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-import com.android.phone.common.mail.store.ImapStore;
-
-public final class ImapConstants {
-    private ImapConstants() {}
-
-    public static final String FETCH_FIELD_BODY_PEEK_BARE = "BODY.PEEK";
-    public static final String FETCH_FIELD_BODY_PEEK = FETCH_FIELD_BODY_PEEK_BARE + "[]";
-    public static final String FETCH_FIELD_BODY_PEEK_SANE
-            = String.format("BODY.PEEK[]<0.%d>", ImapStore.FETCH_BODY_SANE_SUGGESTED_SIZE);
-    public static final String FETCH_FIELD_HEADERS =
-            "BODY.PEEK[HEADER.FIELDS (date subject from content-type to cc message-id)]";
-
-    public static final String ALERT = "ALERT";
-    public static final String APPEND = "APPEND";
-    public static final String BAD = "BAD";
-    public static final String BADCHARSET = "BADCHARSET";
-    public static final String BODY = "BODY";
-    public static final String BODY_BRACKET_HEADER = "BODY[HEADER";
-    public static final String BODYSTRUCTURE = "BODYSTRUCTURE";
-    public static final String BYE = "BYE";
-    public static final String CAPABILITY = "CAPABILITY";
-    public static final String CHECK = "CHECK";
-    public static final String CLOSE = "CLOSE";
-    public static final String COPY = "COPY";
-    public static final String CREATE = "CREATE";
-    public static final String DELETE = "DELETE";
-    public static final String EXAMINE = "EXAMINE";
-    public static final String EXISTS = "EXISTS";
-    public static final String EXPUNGE = "EXPUNGE";
-    public static final String FETCH = "FETCH";
-    public static final String FLAG_ANSWERED = "\\ANSWERED";
-    public static final String FLAG_DELETED = "\\DELETED";
-    public static final String FLAG_FLAGGED = "\\FLAGGED";
-    public static final String FLAG_NO_SELECT = "\\NOSELECT";
-    public static final String FLAG_SEEN = "\\SEEN";
-    public static final String FLAGS = "FLAGS";
-    public static final String FLAGS_SILENT = "FLAGS.SILENT";
-    public static final String ID = "ID";
-    public static final String INBOX = "INBOX";
-    public static final String INTERNALDATE = "INTERNALDATE";
-    public static final String LIST = "LIST";
-    public static final String LOGIN = "LOGIN";
-    public static final String LOGOUT = "LOGOUT";
-    public static final String LSUB = "LSUB";
-    public static final String NO = "NO";
-    public static final String NOOP = "NOOP";
-    public static final String OK = "OK";
-    public static final String PARSE = "PARSE";
-    public static final String PERMANENTFLAGS = "PERMANENTFLAGS";
-    public static final String PREAUTH = "PREAUTH";
-    public static final String READ_ONLY = "READ-ONLY";
-    public static final String READ_WRITE = "READ-WRITE";
-    public static final String RENAME = "RENAME";
-    public static final String RFC822_SIZE = "RFC822.SIZE";
-    public static final String SEARCH = "SEARCH";
-    public static final String SELECT = "SELECT";
-    public static final String STARTTLS = "STARTTLS";
-    public static final String STATUS = "STATUS";
-    public static final String STORE = "STORE";
-    public static final String SUBSCRIBE = "SUBSCRIBE";
-    public static final String TEXT = "TEXT";
-    public static final String TRYCREATE = "TRYCREATE";
-    public static final String UID = "UID";
-    public static final String UID_COPY = "UID COPY";
-    public static final String UID_FETCH = "UID FETCH";
-    public static final String UID_SEARCH = "UID SEARCH";
-    public static final String UID_STORE = "UID STORE";
-    public static final String UIDNEXT = "UIDNEXT";
-    public static final String UIDVALIDITY = "UIDVALIDITY";
-    public static final String UNSEEN = "UNSEEN";
-    public static final String UNSUBSCRIBE = "UNSUBSCRIBE";
-    public static final String APPENDUID = "APPENDUID";
-    public static final String NIL = "NIL";
-
-    /** response codes within IMAP responses */
-    public static final String EXPIRED = "EXPIRED";
-    public static final String AUTHENTICATIONFAILED = "AUTHENTICATIONFAILED";
-    public static final String UNAVAILABLE = "UNAVAILABLE";
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapElement.java b/src/com/android/phone/common/mail/store/imap/ImapElement.java
deleted file mode 100644
index 2d1824e..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapElement.java
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-/**
- * Class representing "element"s in IMAP responses.
- *
- * <p>Class hierarchy:
- * <pre>
- * ImapElement
- *   |
- *   |-- ImapElement.NONE (for 'index out of range')
- *   |
- *   |-- ImapList (isList() == true)
- *   |   |
- *   |   |-- ImapList.EMPTY
- *   |   |
- *   |   --- ImapResponse
- *   |
- *   --- ImapString (isString() == true)
- *       |
- *       |-- ImapString.EMPTY
- *       |
- *       |-- ImapSimpleString
- *       |
- *       |-- ImapMemoryLiteral
- *       |
- *       --- ImapTempFileLiteral
- * </pre>
- */
-public abstract class ImapElement {
-    /**
-     * An element that is returned by {@link ImapList#getElementOrNone} to indicate an index
-     * is out of range.
-     */
-    public static final ImapElement NONE = new ImapElement() {
-        @Override public void destroy() {
-            // Don't call super.destroy().
-            // It's a shared object.  We don't want the mDestroyed to be set on this.
-        }
-
-        @Override public boolean isList() {
-            return false;
-        }
-
-        @Override public boolean isString() {
-            return false;
-        }
-
-        @Override public String toString() {
-            return "[NO ELEMENT]";
-        }
-
-        @Override
-        public boolean equalsForTest(ImapElement that) {
-            return super.equalsForTest(that);
-        }
-    };
-
-    private boolean mDestroyed = false;
-
-    public abstract boolean isList();
-
-    public abstract boolean isString();
-
-    protected boolean isDestroyed() {
-        return mDestroyed;
-    }
-
-    /**
-     * Clean up the resources used by the instance.
-     * It's for removing a temp file used by {@link ImapTempFileLiteral}.
-     */
-    public void destroy() {
-        mDestroyed = true;
-    }
-
-    /**
-     * Throws {@link RuntimeException} if it's already destroyed.
-     */
-    protected final void checkNotDestroyed() {
-        if (mDestroyed) {
-            throw new RuntimeException("Already destroyed");
-        }
-    }
-
-    /**
-     * Return a string that represents this object; it's purely for the debug purpose.  Don't
-     * mistake it for {@link ImapString#getString}.
-     *
-     * Abstract to force subclasses to implement it.
-     */
-    @Override
-    public abstract String toString();
-
-    /**
-     * The equals implementation that is intended to be used only for unit testing.
-     * (Because it may be heavy and has a special sense of "equal" for testing.)
-     */
-    public boolean equalsForTest(ImapElement that) {
-        if (that == null) {
-            return false;
-        }
-        return this.getClass() == that.getClass(); // Has to be the same class.
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapList.java b/src/com/android/phone/common/mail/store/imap/ImapList.java
deleted file mode 100644
index 93adc4f..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapList.java
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-import java.util.ArrayList;
-
-/**
- * Class represents an IMAP list.
- */
-public class ImapList extends ImapElement {
-    /**
-     * {@link ImapList} representing an empty list.
-     */
-    public static final ImapList EMPTY = new ImapList() {
-        @Override public void destroy() {
-            // Don't call super.destroy().
-            // It's a shared object.  We don't want the mDestroyed to be set on this.
-        }
-
-        @Override void add(ImapElement e) {
-            throw new RuntimeException();
-        }
-    };
-
-    private ArrayList<ImapElement> mList = new ArrayList<ImapElement>();
-
-    /* package */ void add(ImapElement e) {
-        if (e == null) {
-            throw new RuntimeException("Can't add null");
-        }
-        mList.add(e);
-    }
-
-    @Override
-    public final boolean isString() {
-        return false;
-    }
-
-    @Override
-    public final boolean isList() {
-        return true;
-    }
-
-    public final int size() {
-        return mList.size();
-    }
-
-    public final boolean isEmpty() {
-        return size() == 0;
-    }
-
-    /**
-     * Return true if the element at {@code index} exists, is string, and equals to {@code s}.
-     * (case insensitive)
-     */
-    public final boolean is(int index, String s) {
-        return is(index, s, false);
-    }
-
-    /**
-     * Same as {@link #is(int, String)}, but does the prefix match if {@code prefixMatch}.
-     */
-    public final boolean is(int index, String s, boolean prefixMatch) {
-        if (!prefixMatch) {
-            return getStringOrEmpty(index).is(s);
-        } else {
-            return getStringOrEmpty(index).startsWith(s);
-        }
-    }
-
-    /**
-     * Return the element at {@code index}.
-     * If {@code index} is out of range, returns {@link ImapElement#NONE}.
-     */
-    public final ImapElement getElementOrNone(int index) {
-        return (index >= mList.size()) ? ImapElement.NONE : mList.get(index);
-    }
-
-    /**
-     * Return the element at {@code index} if it's a list.
-     * If {@code index} is out of range or not a list, returns {@link ImapList#EMPTY}.
-     */
-    public final ImapList getListOrEmpty(int index) {
-        ImapElement el = getElementOrNone(index);
-        return el.isList() ? (ImapList) el : EMPTY;
-    }
-
-    /**
-     * Return the element at {@code index} if it's a string.
-     * If {@code index} is out of range or not a string, returns {@link ImapString#EMPTY}.
-     */
-    public final ImapString getStringOrEmpty(int index) {
-        ImapElement el = getElementOrNone(index);
-        return el.isString() ? (ImapString) el : ImapString.EMPTY;
-    }
-
-    /**
-     * Return an element keyed by {@code key}.  Return null if not found.  {@code key} has to be
-     * at an even index.
-     */
-    /* package */ final ImapElement getKeyedElementOrNull(String key, boolean prefixMatch) {
-        for (int i = 1; i < size(); i += 2) {
-            if (is(i-1, key, prefixMatch)) {
-                return mList.get(i);
-            }
-        }
-        return null;
-    }
-
-    /**
-     * Return an {@link ImapList} keyed by {@code key}.
-     * Return {@link ImapList#EMPTY} if not found.
-     */
-    public final ImapList getKeyedListOrEmpty(String key) {
-        return getKeyedListOrEmpty(key, false);
-    }
-
-    /**
-     * Return an {@link ImapList} keyed by {@code key}.
-     * Return {@link ImapList#EMPTY} if not found.
-     */
-    public final ImapList getKeyedListOrEmpty(String key, boolean prefixMatch) {
-        ImapElement e = getKeyedElementOrNull(key, prefixMatch);
-        return (e != null) ? ((ImapList) e) : ImapList.EMPTY;
-    }
-
-    /**
-     * Return an {@link ImapString} keyed by {@code key}.
-     * Return {@link ImapString#EMPTY} if not found.
-     */
-    public final ImapString getKeyedStringOrEmpty(String key) {
-        return getKeyedStringOrEmpty(key, false);
-    }
-
-    /**
-     * Return an {@link ImapString} keyed by {@code key}.
-     * Return {@link ImapString#EMPTY} if not found.
-     */
-    public final ImapString getKeyedStringOrEmpty(String key, boolean prefixMatch) {
-        ImapElement e = getKeyedElementOrNull(key, prefixMatch);
-        return (e != null) ? ((ImapString) e) : ImapString.EMPTY;
-    }
-
-    /**
-     * Return true if it contains {@code s}.
-     */
-    public final boolean contains(String s) {
-        for (int i = 0; i < size(); i++) {
-            if (getStringOrEmpty(i).is(s)) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    @Override
-    public void destroy() {
-        if (mList != null) {
-            for (ImapElement e : mList) {
-                e.destroy();
-            }
-            mList = null;
-        }
-        super.destroy();
-    }
-
-    @Override
-    public String toString() {
-        return mList.toString();
-    }
-
-    /**
-     * Return the text representations of the contents concatenated with ",".
-     */
-    public final String flatten() {
-        return flatten(new StringBuilder()).toString();
-    }
-
-    /**
-     * Returns text representations (i.e. getString()) of contents joined together with
-     * "," as the separator.
-     *
-     * Only used for building the capability string passed to vendor policies.
-     *
-     * We can't use toString(), because it's for debugging (meaning the format may change any time),
-     * and it won't expand literals.
-     */
-    private final StringBuilder flatten(StringBuilder sb) {
-        sb.append('[');
-        for (int i = 0; i < mList.size(); i++) {
-            if (i > 0) {
-                sb.append(',');
-            }
-            final ImapElement e = getElementOrNone(i);
-            if (e.isList()) {
-                getListOrEmpty(i).flatten(sb);
-            } else if (e.isString()) {
-                sb.append(getStringOrEmpty(i).getString());
-            }
-        }
-        sb.append(']');
-        return sb;
-    }
-
-    @Override
-    public boolean equalsForTest(ImapElement that) {
-        if (!super.equalsForTest(that)) {
-            return false;
-        }
-        ImapList thatList = (ImapList) that;
-        if (size() != thatList.size()) {
-            return false;
-        }
-        for (int i = 0; i < size(); i++) {
-            if (!mList.get(i).equalsForTest(thatList.getElementOrNone(i))) {
-                return false;
-            }
-        }
-        return true;
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapMemoryLiteral.java b/src/com/android/phone/common/mail/store/imap/ImapMemoryLiteral.java
deleted file mode 100644
index aac66c2..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapMemoryLiteral.java
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-import android.util.Log;
-
-import com.android.phone.common.mail.FixedLengthInputStream;
-
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.UnsupportedEncodingException;
-
-/**
- * Subclass of {@link ImapString} used for literals backed by an in-memory byte array.
- */
-public class ImapMemoryLiteral extends ImapString {
-    private final String TAG = "ImapMemoryLiteral";
-    private byte[] mData;
-
-    /* package */ ImapMemoryLiteral(FixedLengthInputStream in) throws IOException {
-        // We could use ByteArrayOutputStream and IOUtils.copy, but it'd perform an unnecessary
-        // copy....
-        mData = new byte[in.getLength()];
-        int pos = 0;
-        while (pos < mData.length) {
-            int read = in.read(mData, pos, mData.length - pos);
-            if (read < 0) {
-                break;
-            }
-            pos += read;
-        }
-        if (pos != mData.length) {
-            Log.w(TAG, "");
-        }
-    }
-
-    @Override
-    public void destroy() {
-        mData = null;
-        super.destroy();
-    }
-
-    @Override
-    public String getString() {
-        try {
-            return new String(mData, "US-ASCII");
-        } catch (UnsupportedEncodingException e) {
-            Log.e(TAG, "Unsupported encoding: ", e);
-        }
-        return null;
-    }
-
-    @Override
-    public InputStream getAsStream() {
-        return new ByteArrayInputStream(mData);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("{%d byte literal(memory)}", mData.length);
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapResponse.java b/src/com/android/phone/common/mail/store/imap/ImapResponse.java
deleted file mode 100644
index 4891966..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapResponse.java
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-/**
- * Class represents an IMAP response.
- */
-public class ImapResponse extends ImapList {
-    private final String mTag;
-    private final boolean mIsContinuationRequest;
-
-    /* package */ ImapResponse(String tag, boolean isContinuationRequest) {
-        mTag = tag;
-        mIsContinuationRequest = isContinuationRequest;
-    }
-
-    /* package */ static boolean isStatusResponse(String symbol) {
-        return     ImapConstants.OK.equalsIgnoreCase(symbol)
-                || ImapConstants.NO.equalsIgnoreCase(symbol)
-                || ImapConstants.BAD.equalsIgnoreCase(symbol)
-                || ImapConstants.PREAUTH.equalsIgnoreCase(symbol)
-                || ImapConstants.BYE.equalsIgnoreCase(symbol);
-    }
-
-    /**
-     * @return whether it's a tagged response.
-     */
-    public boolean isTagged() {
-        return mTag != null;
-    }
-
-    /**
-     * @return whether it's a continuation request.
-     */
-    public boolean isContinuationRequest() {
-        return mIsContinuationRequest;
-    }
-
-    public boolean isStatusResponse() {
-        return isStatusResponse(getStringOrEmpty(0).getString());
-    }
-
-    /**
-     * @return whether it's an OK response.
-     */
-    public boolean isOk() {
-        return is(0, ImapConstants.OK);
-    }
-
-    /**
-     * @return whether it's an BAD response.
-     */
-    public boolean isBad() {
-        return is(0, ImapConstants.BAD);
-    }
-
-    /**
-     * @return whether it's an NO response.
-     */
-    public boolean isNo() {
-        return is(0, ImapConstants.NO);
-    }
-
-    /**
-     * @return whether it's an {@code responseType} data response.  (i.e. not tagged).
-     * @param index where {@code responseType} should appear.  e.g. 1 for "FETCH"
-     * @param responseType e.g. "FETCH"
-     */
-    public final boolean isDataResponse(int index, String responseType) {
-        return !isTagged() && getStringOrEmpty(index).is(responseType);
-    }
-
-    /**
-     * @return Response code (RFC 3501 7.1) if it's a status response.
-     *
-     * e.g. "ALERT" for "* OK [ALERT] System shutdown in 10 minutes"
-     */
-    public ImapString getResponseCodeOrEmpty() {
-        if (!isStatusResponse()) {
-            return ImapString.EMPTY; // Not a status response.
-        }
-        return getListOrEmpty(1).getStringOrEmpty(0);
-    }
-
-    /**
-     * @return Alert message it it has ALERT response code.
-     *
-     * e.g. "System shutdown in 10 minutes" for "* OK [ALERT] System shutdown in 10 minutes"
-     */
-    public ImapString getAlertTextOrEmpty() {
-        if (!getResponseCodeOrEmpty().is(ImapConstants.ALERT)) {
-            return ImapString.EMPTY; // Not an ALERT
-        }
-        // The 3rd element contains all the rest of line.
-        return getStringOrEmpty(2);
-    }
-
-    /**
-     * @return Response text in a status response.
-     */
-    public ImapString getStatusResponseTextOrEmpty() {
-        if (!isStatusResponse()) {
-            return ImapString.EMPTY;
-        }
-        return getStringOrEmpty(getElementOrNone(1).isList() ? 2 : 1);
-    }
-
-    public ImapString getStatusOrEmpty() {
-        if (!isStatusResponse()) {
-            return ImapString.EMPTY;
-        }
-        return getStringOrEmpty(0);
-    }
-
-    @Override
-    public String toString() {
-        String tag = mTag;
-        if (isContinuationRequest()) {
-            tag = "+";
-        }
-        return "#" + tag + "# " + super.toString();
-    }
-
-    @Override
-    public boolean equalsForTest(ImapElement that) {
-        if (!super.equalsForTest(that)) {
-            return false;
-        }
-        final ImapResponse thatResponse = (ImapResponse) that;
-        if (mTag == null) {
-            if (thatResponse.mTag != null) {
-                return false;
-            }
-        } else {
-            if (!mTag.equals(thatResponse.mTag)) {
-                return false;
-            }
-        }
-        if (mIsContinuationRequest != thatResponse.mIsContinuationRequest) {
-            return false;
-        }
-        return true;
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapResponseParser.java b/src/com/android/phone/common/mail/store/imap/ImapResponseParser.java
deleted file mode 100644
index 1bf1565..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapResponseParser.java
+++ /dev/null
@@ -1,434 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-import android.text.TextUtils;
-import android.util.Log;
-
-import com.android.phone.common.mail.FixedLengthInputStream;
-import com.android.phone.common.mail.PeekableInputStream;
-import com.android.phone.common.mail.MessagingException;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.ArrayList;
-
-/**
- * IMAP response parser.
- */
-public class ImapResponseParser {
-    private static final String TAG = "ImapResponseParser";
-
-    /**
-     * Literal larger than this will be stored in temp file.
-     */
-    public static final int LITERAL_KEEP_IN_MEMORY_THRESHOLD = 2 * 1024 * 1024;
-
-    /** Input stream */
-    private final PeekableInputStream mIn;
-
-    private final int mLiteralKeepInMemoryThreshold;
-
-    /** StringBuilder used by readUntil() */
-    private final StringBuilder mBufferReadUntil = new StringBuilder();
-
-    /** StringBuilder used by parseBareString() */
-    private final StringBuilder mParseBareString = new StringBuilder();
-
-    /**
-     * We store all {@link ImapResponse} in it.  {@link #destroyResponses()} must be called from
-     * time to time to destroy them and clear it.
-     */
-    private final ArrayList<ImapResponse> mResponsesToDestroy = new ArrayList<ImapResponse>();
-
-    /**
-     * Exception thrown when we receive BYE.  It derives from IOException, so it'll be treated
-     * in the same way EOF does.
-     */
-    public static class ByeException extends IOException {
-        public static final String MESSAGE = "Received BYE";
-        public ByeException() {
-            super(MESSAGE);
-        }
-    }
-
-    /**
-     * Public constructor for normal use.
-     */
-    public ImapResponseParser(InputStream in) {
-        this(in, LITERAL_KEEP_IN_MEMORY_THRESHOLD);
-    }
-
-    /**
-     * Constructor for testing to override the literal size threshold.
-     */
-    /* package for test */ ImapResponseParser(InputStream in, int literalKeepInMemoryThreshold) {
-        mIn = new PeekableInputStream(in);
-        mLiteralKeepInMemoryThreshold = literalKeepInMemoryThreshold;
-    }
-
-    private static IOException newEOSException() {
-        final String message = "End of stream reached";
-        if (Log.isLoggable(TAG, Log.DEBUG)) {
-            Log.d(TAG, message);
-        }
-        return new IOException(message);
-    }
-
-    /**
-     * Peek next one byte.
-     *
-     * Throws IOException() if reaches EOF.  As long as logical response lines end with \r\n,
-     * we shouldn't see EOF during parsing.
-     */
-    private int peek() throws IOException {
-        final int next = mIn.peek();
-        if (next == -1) {
-            throw newEOSException();
-        }
-        return next;
-    }
-
-    /**
-     * Read and return one byte from {@link #mIn}, and put it in {@link #mDiscourseLogger}.
-     *
-     * Throws IOException() if reaches EOF.  As long as logical response lines end with \r\n,
-     * we shouldn't see EOF during parsing.
-     */
-    private int readByte() throws IOException {
-        int next = mIn.read();
-        if (next == -1) {
-            throw newEOSException();
-        }
-        return next;
-    }
-
-    /**
-     * Destroy all the {@link ImapResponse}s stored in the internal storage and clear it.
-     *
-     * @see #readResponse()
-     */
-    public void destroyResponses() {
-        for (ImapResponse r : mResponsesToDestroy) {
-            r.destroy();
-        }
-        mResponsesToDestroy.clear();
-    }
-
-    /**
-     * Reads the next response available on the stream and returns an
-     * {@link ImapResponse} object that represents it.
-     *
-     * <p>When this method successfully returns an {@link ImapResponse}, the {@link ImapResponse}
-     * is stored in the internal storage.  When the {@link ImapResponse} is no longer used
-     * {@link #destroyResponses} should be called to destroy all the responses in the array.
-     *
-     * @return the parsed {@link ImapResponse} object.
-     * @exception ByeException when detects BYE.
-     */
-    public ImapResponse readResponse() throws IOException, MessagingException {
-        ImapResponse response = null;
-        try {
-            response = parseResponse();
-            if (Log.isLoggable(TAG, Log.DEBUG)) {
-                Log.d(TAG, "<<< " + response.toString());
-            }
-        } catch (RuntimeException e) {
-            // Parser crash -- log network activities.
-            onParseError(e);
-            throw e;
-        } catch (IOException e) {
-            // Network error, or received an unexpected char.
-            onParseError(e);
-            throw e;
-        }
-
-        // Handle this outside of try-catch.  We don't have to dump protocol log when getting BYE.
-        if (response.is(0, ImapConstants.BYE)) {
-            Log.w(TAG, ByeException.MESSAGE);
-            response.destroy();
-            throw new ByeException();
-        }
-        mResponsesToDestroy.add(response);
-        return response;
-    }
-
-    private void onParseError(Exception e) {
-        // Read a few more bytes, so that the log will contain some more context, even if the parser
-        // crashes in the middle of a response.
-        // This also makes sure the byte in question will be logged, no matter where it crashes.
-        // e.g. when parseAtom() peeks and finds at an unexpected char, it throws an exception
-        // before actually reading it.
-        // However, we don't want to read too much, because then it may get into an email message.
-        try {
-            for (int i = 0; i < 4; i++) {
-                int b = readByte();
-                if (b == -1 || b == '\n') {
-                    break;
-                }
-            }
-        } catch (IOException ignore) {
-        }
-        Log.w(TAG, "Exception detected: " + e.getMessage());
-    }
-
-    /**
-     * Read next byte from stream and throw it away.  If the byte is different from {@code expected}
-     * throw {@link MessagingException}.
-     */
-    /* package for test */ void expect(char expected) throws IOException {
-        final int next = readByte();
-        if (expected != next) {
-            throw new IOException(String.format("Expected %04x (%c) but got %04x (%c)",
-                    (int) expected, expected, next, (char) next));
-        }
-    }
-
-    /**
-     * Read bytes until we find {@code end}, and return all as string.
-     * The {@code end} will be read (rather than peeked) and won't be included in the result.
-     */
-    /* package for test */ String readUntil(char end) throws IOException {
-        mBufferReadUntil.setLength(0);
-        for (;;) {
-            final int ch = readByte();
-            if (ch != end) {
-                mBufferReadUntil.append((char) ch);
-            } else {
-                return mBufferReadUntil.toString();
-            }
-        }
-    }
-
-    /**
-     * Read all bytes until \r\n.
-     */
-    /* package */ String readUntilEol() throws IOException {
-        String ret = readUntil('\r');
-        expect('\n'); // TODO Should this really be error?
-        return ret;
-    }
-
-    /**
-     * Parse and return the response line.
-     */
-    private ImapResponse parseResponse() throws IOException, MessagingException {
-        // We need to destroy the response if we get an exception.
-        // So, we first store the response that's being built in responseToDestroy, until it's
-        // completely built, at which point we copy it into responseToReturn and null out
-        // responseToDestroyt.
-        // If responseToDestroy is not null in finally, we destroy it because that means
-        // we got an exception somewhere.
-        ImapResponse responseToDestroy = null;
-        final ImapResponse responseToReturn;
-
-        try {
-            final int ch = peek();
-            if (ch == '+') { // Continuation request
-                readByte(); // skip +
-                expect(' ');
-                responseToDestroy = new ImapResponse(null, true);
-
-                // If it's continuation request, we don't really care what's in it.
-                responseToDestroy.add(new ImapSimpleString(readUntilEol()));
-
-                // Response has successfully been built.  Let's return it.
-                responseToReturn = responseToDestroy;
-                responseToDestroy = null;
-            } else {
-                // Status response or response data
-                final String tag;
-                if (ch == '*') {
-                    tag = null;
-                    readByte(); // skip *
-                    expect(' ');
-                } else {
-                    tag = readUntil(' ');
-                }
-                responseToDestroy = new ImapResponse(tag, false);
-
-                final ImapString firstString = parseBareString();
-                responseToDestroy.add(firstString);
-
-                // parseBareString won't eat a space after the string, so we need to skip it,
-                // if exists.
-                // If the next char is not ' ', it should be EOL.
-                if (peek() == ' ') {
-                    readByte(); // skip ' '
-
-                    if (responseToDestroy.isStatusResponse()) { // It's a status response
-
-                        // Is there a response code?
-                        final int next = peek();
-                        if (next == '[') {
-                            responseToDestroy.add(parseList('[', ']'));
-                            if (peek() == ' ') { // Skip following space
-                                readByte();
-                            }
-                        }
-
-                        String rest = readUntilEol();
-                        if (!TextUtils.isEmpty(rest)) {
-                            // The rest is free-form text.
-                            responseToDestroy.add(new ImapSimpleString(rest));
-                        }
-                    } else { // It's a response data.
-                        parseElements(responseToDestroy, '\0');
-                    }
-                } else {
-                    expect('\r');
-                    expect('\n');
-                }
-
-                // Response has successfully been built.  Let's return it.
-                responseToReturn = responseToDestroy;
-                responseToDestroy = null;
-            }
-        } finally {
-            if (responseToDestroy != null) {
-                // We get an exception.
-                responseToDestroy.destroy();
-            }
-        }
-
-        return responseToReturn;
-    }
-
-    private ImapElement parseElement() throws IOException, MessagingException {
-        final int next = peek();
-        switch (next) {
-            case '(':
-                return parseList('(', ')');
-            case '[':
-                return parseList('[', ']');
-            case '"':
-                readByte(); // Skip "
-                return new ImapSimpleString(readUntil('"'));
-            case '{':
-                return parseLiteral();
-            case '\r':  // CR
-                readByte(); // Consume \r
-                expect('\n'); // Should be followed by LF.
-                return null;
-            case '\n': // LF // There shouldn't be a bare LF, but just in case.
-                readByte(); // Consume \n
-                return null;
-            default:
-                return parseBareString();
-        }
-    }
-
-    /**
-     * Parses an atom.
-     *
-     * Special case: If an atom contains '[', everything until the next ']' will be considered
-     * a part of the atom.
-     * (e.g. "BODY[HEADER.FIELDS ("DATE" ...)]" will become a single ImapString)
-     *
-     * If the value is "NIL", returns an empty string.
-     */
-    private ImapString parseBareString() throws IOException, MessagingException {
-        mParseBareString.setLength(0);
-        for (;;) {
-            final int ch = peek();
-
-            // TODO Can we clean this up?  (This condition is from the old parser.)
-            if (ch == '(' || ch == ')' || ch == '{' || ch == ' ' ||
-                    // ']' is not part of atom (it's in resp-specials)
-                    ch == ']' ||
-                    // docs claim that flags are \ atom but atom isn't supposed to
-                    // contain
-                    // * and some flags contain *
-                    // ch == '%' || ch == '*' ||
-                    ch == '%' ||
-                    // TODO probably should not allow \ and should recognize
-                    // it as a flag instead
-                    // ch == '"' || ch == '\' ||
-                    ch == '"' || (0x00 <= ch && ch <= 0x1f) || ch == 0x7f) {
-                if (mParseBareString.length() == 0) {
-                    throw new MessagingException("Expected string, none found.");
-                }
-                String s = mParseBareString.toString();
-
-                // NIL will be always converted into the empty string.
-                if (ImapConstants.NIL.equalsIgnoreCase(s)) {
-                    return ImapString.EMPTY;
-                }
-                return new ImapSimpleString(s);
-            } else if (ch == '[') {
-                // Eat all until next ']'
-                mParseBareString.append((char) readByte());
-                mParseBareString.append(readUntil(']'));
-                mParseBareString.append(']'); // readUntil won't include the end char.
-            } else {
-                mParseBareString.append((char) readByte());
-            }
-        }
-    }
-
-    private void parseElements(ImapList list, char end)
-            throws IOException, MessagingException {
-        for (;;) {
-            for (;;) {
-                final int next = peek();
-                if (next == end) {
-                    return;
-                }
-                if (next != ' ') {
-                    break;
-                }
-                // Skip space
-                readByte();
-            }
-            final ImapElement el = parseElement();
-            if (el == null) { // EOL
-                return;
-            }
-            list.add(el);
-        }
-    }
-
-    private ImapList parseList(char opening, char closing)
-            throws IOException, MessagingException {
-        expect(opening);
-        final ImapList list = new ImapList();
-        parseElements(list, closing);
-        expect(closing);
-        return list;
-    }
-
-    private ImapString parseLiteral() throws IOException, MessagingException {
-        expect('{');
-        final int size;
-        try {
-            size = Integer.parseInt(readUntil('}'));
-        } catch (NumberFormatException nfe) {
-            throw new MessagingException("Invalid length in literal");
-        }
-        if (size < 0) {
-            throw new MessagingException("Invalid negative length in literal");
-        }
-        expect('\r');
-        expect('\n');
-        FixedLengthInputStream in = new FixedLengthInputStream(mIn, size);
-        if (size > mLiteralKeepInMemoryThreshold) {
-            return new ImapTempFileLiteral(in);
-        } else {
-            return new ImapMemoryLiteral(in);
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapSimpleString.java b/src/com/android/phone/common/mail/store/imap/ImapSimpleString.java
deleted file mode 100644
index 3d5263b..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapSimpleString.java
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-import android.util.Log;
-
-import java.io.ByteArrayInputStream;
-import java.io.InputStream;
-import java.io.UnsupportedEncodingException;
-
-/**
- * Subclass of {@link ImapString} used for non literals.
- */
-public class ImapSimpleString extends ImapString {
-    private final String TAG = "ImapSimpleString";
-    private String mString;
-
-    /* package */  ImapSimpleString(String string) {
-        mString = (string != null) ? string : "";
-    }
-
-    @Override
-    public void destroy() {
-        mString = null;
-        super.destroy();
-    }
-
-    @Override
-    public String getString() {
-        return mString;
-    }
-
-    @Override
-    public InputStream getAsStream() {
-        try {
-            return new ByteArrayInputStream(mString.getBytes("US-ASCII"));
-        } catch (UnsupportedEncodingException e) {
-            Log.e(TAG, "Unsupported encoding: ", e);
-        }
-        return null;
-    }
-
-    @Override
-    public String toString() {
-        // Purposefully not return just mString, in order to prevent using it instead of getString.
-        return "\"" + mString + "\"";
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapString.java b/src/com/android/phone/common/mail/store/imap/ImapString.java
deleted file mode 100644
index f38a993..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapString.java
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-import android.util.Log;
-
-import java.io.ByteArrayInputStream;
-import java.io.InputStream;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.Locale;
-
-/**
- * Class represents an IMAP "element" that is not a list.
- *
- * An atom, quoted string, literal, are all represented by this.  Values like OK, STATUS are too.
- * Also, this class class may contain more arbitrary value like "BODY[HEADER.FIELDS ("DATE")]".
- * See {@link ImapResponseParser}.
- */
-public abstract class ImapString extends ImapElement {
-    private static final byte[] EMPTY_BYTES = new byte[0];
-
-    public static final ImapString EMPTY = new ImapString() {
-        @Override public void destroy() {
-            // Don't call super.destroy().
-            // It's a shared object.  We don't want the mDestroyed to be set on this.
-        }
-
-        @Override public String getString() {
-            return "";
-        }
-
-        @Override public InputStream getAsStream() {
-            return new ByteArrayInputStream(EMPTY_BYTES);
-        }
-
-        @Override public String toString() {
-            return "";
-        }
-    };
-
-    // This is used only for parsing IMAP's FETCH ENVELOPE command, in which
-    // en_US-like date format is used like "01-Jan-2009 11:20:39 -0800", so this should be
-    // handled by Locale.US
-    private final static SimpleDateFormat DATE_TIME_FORMAT =
-            new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss Z", Locale.US);
-
-    private boolean mIsInteger;
-    private int mParsedInteger;
-    private Date mParsedDate;
-
-    @Override
-    public final boolean isList() {
-        return false;
-    }
-
-    @Override
-    public final boolean isString() {
-        return true;
-    }
-
-    /**
-     * @return true if and only if the length of the string is larger than 0.
-     *
-     * Note: IMAP NIL is considered an empty string. See {@link ImapResponseParser
-     * #parseBareString}.
-     * On the other hand, a quoted/literal string with value NIL (i.e. "NIL" and {3}\r\nNIL) is
-     * treated literally.
-     */
-    public final boolean isEmpty() {
-        return getString().length() == 0;
-    }
-
-    public abstract String getString();
-
-    public abstract InputStream getAsStream();
-
-    /**
-     * @return whether it can be parsed as a number.
-     */
-    public final boolean isNumber() {
-        if (mIsInteger) {
-            return true;
-        }
-        try {
-            mParsedInteger = Integer.parseInt(getString());
-            mIsInteger = true;
-            return true;
-        } catch (NumberFormatException e) {
-            return false;
-        }
-    }
-
-    /**
-     * @return value parsed as a number.
-     */
-    public final int getNumberOrZero() {
-        if (!isNumber()) {
-            return 0;
-        }
-        return mParsedInteger;
-    }
-
-    /**
-     * @return whether it can be parsed as a date using {@link #DATE_TIME_FORMAT}.
-     */
-    public final boolean isDate() {
-        if (mParsedDate != null) {
-            return true;
-        }
-        if (isEmpty()) {
-            return false;
-        }
-        try {
-            mParsedDate = DATE_TIME_FORMAT.parse(getString());
-            return true;
-        } catch (ParseException e) {
-            Log.w("ImapString", getString() + " can't be parsed as a date.");
-            return false;
-        }
-    }
-
-    /**
-     * @return value it can be parsed as a {@link Date}, or null otherwise.
-     */
-    public final Date getDateOrNull() {
-        if (!isDate()) {
-            return null;
-        }
-        return mParsedDate;
-    }
-
-    /**
-     * @return whether the value case-insensitively equals to {@code s}.
-     */
-    public final boolean is(String s) {
-        if (s == null) {
-            return false;
-        }
-        return getString().equalsIgnoreCase(s);
-    }
-
-
-    /**
-     * @return whether the value case-insensitively starts with {@code s}.
-     */
-    public final boolean startsWith(String prefix) {
-        if (prefix == null) {
-            return false;
-        }
-        final String me = this.getString();
-        if (me.length() < prefix.length()) {
-            return false;
-        }
-        return me.substring(0, prefix.length()).equalsIgnoreCase(prefix);
-    }
-
-    // To force subclasses to implement it.
-    @Override
-    public abstract String toString();
-
-    @Override
-    public final boolean equalsForTest(ImapElement that) {
-        if (!super.equalsForTest(that)) {
-            return false;
-        }
-        ImapString thatString = (ImapString) that;
-        return getString().equals(thatString.getString());
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapTempFileLiteral.java b/src/com/android/phone/common/mail/store/imap/ImapTempFileLiteral.java
deleted file mode 100644
index 2b1113e..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapTempFileLiteral.java
+++ /dev/null
@@ -1,203 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.phone.common.mail.store.imap;
-
-import android.content.Context;
-import android.util.Log;
-
-import com.android.phone.common.mail.FixedLengthInputStream;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-/**
- * Subclass of {@link ImapString} used for literals backed by a temp file.
- */
-public class ImapTempFileLiteral extends ImapString {
-    private final String TAG = "ImapTempFileLiteral";
-
-    /* package for test */ final File mFile;
-
-    /** Size is purely for toString() */
-    private final int mSize;
-
-    /* package */  ImapTempFileLiteral(FixedLengthInputStream stream) throws IOException {
-        mSize = stream.getLength();
-        mFile = File.createTempFile("imap", ".tmp", TempDirectory.getTempDirectory());
-
-        // Unfortunately, we can't really use deleteOnExit(), because temp filenames are random
-        // so it'd simply cause a memory leak.
-        // deleteOnExit() simply adds filenames to a static list and the list will never shrink.
-        // mFile.deleteOnExit();
-        OutputStream out = new FileOutputStream(mFile);
-        StreamUtils.copy(stream, out);
-        out.close();
-    }
-
-    /**
-     * Copies utility methods for working with byte arrays and I/O streams from guava library.
-     */
-    public static class StreamUtils {
-        private static final int BUF_SIZE = 0x1000; // 4K
-        /**
-         * Copies all bytes from the input stream to the output stream.
-         * Does not close or flush either stream.
-         *
-         * @param from the input stream to read from
-         * @param to the output stream to write to
-         * @return the number of bytes copied
-         * @throws IOException if an I/O error occurs
-         */
-        public static long copy(InputStream from, OutputStream to) throws IOException {
-            checkNotNull(from);
-            checkNotNull(to);
-            byte[] buf = new byte[BUF_SIZE];
-            long total = 0;
-            while (true) {
-              int r = from.read(buf);
-              if (r == -1) {
-                break;
-              }
-              to.write(buf, 0, r);
-              total += r;
-            }
-            return total;
-        }
-
-        /**
-         * Reads all bytes from an input stream into a byte array.
-         * Does not close the stream.
-         *
-         * @param in the input stream to read from
-         * @return a byte array containing all the bytes from the stream
-         * @throws IOException if an I/O error occurs
-         */
-        public static byte[] toByteArray(InputStream in) throws IOException {
-            ByteArrayOutputStream out = new ByteArrayOutputStream();
-            copy(in, out);
-            return out.toByteArray();
-        }
-
-        /**
-         * Ensures that an object reference passed as a parameter to the calling method is not null.
-         *
-         * @param reference an object reference
-         * @return the non-null reference that was validated
-         * @throws NullPointerException if {@code reference} is null
-         */
-        public static <T> T checkNotNull(T reference) {
-            if (reference == null) {
-                throw new NullPointerException();
-            }
-            return reference;
-        }
-    }
-
-    /**
-     * Make sure we delete the temp file.
-     *
-     * We should always be calling {@link ImapResponse#destroy()}, but it's here as a last resort.
-     */
-    @Override
-    protected void finalize() throws Throwable {
-        try {
-            destroy();
-        } finally {
-            super.finalize();
-        }
-    }
-
-    @Override
-    public InputStream getAsStream() {
-        checkNotDestroyed();
-        try {
-            return new FileInputStream(mFile);
-        } catch (FileNotFoundException e) {
-            // It's probably possible if we're low on storage and the system clears the cache dir.
-            Log.w(TAG, "ImapTempFileLiteral: Temp file not found");
-
-            // Return 0 byte stream as a dummy...
-            return new ByteArrayInputStream(new byte[0]);
-        }
-    }
-
-    @Override
-    public String getString() {
-        checkNotDestroyed();
-        try {
-            byte[] bytes = StreamUtils.toByteArray(getAsStream());
-            // Prevent crash from OOM; we've seen this, but only rarely and not reproducibly
-            if (bytes.length > ImapResponseParser.LITERAL_KEEP_IN_MEMORY_THRESHOLD) {
-                throw new IOException();
-            }
-            return new String(bytes, "US-ASCII");
-        } catch (IOException e) {
-            Log.w(TAG, "ImapTempFileLiteral: Error while reading temp file", e);
-            return "";
-        }
-    }
-
-    @Override
-    public void destroy() {
-        try {
-            if (!isDestroyed() && mFile.exists()) {
-                mFile.delete();
-            }
-        } catch (RuntimeException re) {
-            // Just log and ignore.
-            Log.w(TAG, "Failed to remove temp file: " + re.getMessage());
-        }
-        super.destroy();
-    }
-
-    @Override
-    public String toString() {
-        return String.format("{%d byte literal(file)}", mSize);
-    }
-
-    public boolean tempFileExistsForTest() {
-        return mFile.exists();
-    }
-
-   /**
-    * TempDirectory caches the directory used for caching file.  It is set up during application
-    * initialization.
-    */
-   public static class TempDirectory {
-       private static File sTempDirectory = null;
-
-       public static void setTempDirectory(Context context) {
-           sTempDirectory = context.getCacheDir();
-       }
-
-       public static File getTempDirectory() {
-           if (sTempDirectory == null) {
-               throw new RuntimeException(
-                       "TempDirectory not set.  " +
-                       "If in a unit test, call Email.setTempDirectory(context) in setUp().");
-           }
-           return sTempDirectory;
-       }
-   }
-}
\ No newline at end of file
diff --git a/src/com/android/phone/common/mail/store/imap/ImapUtility.java b/src/com/android/phone/common/mail/store/imap/ImapUtility.java
deleted file mode 100644
index 28c8b6f..0000000
--- a/src/com/android/phone/common/mail/store/imap/ImapUtility.java
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.phone.common.mail.store.imap;
-
-/**
- * Utility methods for use with IMAP.
- */
-public class ImapUtility {
-    /**
-     * Apply quoting rules per IMAP RFC,
-     * quoted          = DQUOTE *QUOTED-CHAR DQUOTE
-     * QUOTED-CHAR     = <any TEXT-CHAR except quoted-specials> / "\" quoted-specials
-     * quoted-specials = DQUOTE / "\"
-     *
-     * This is used primarily for IMAP login, but might be useful elsewhere.
-     *
-     * NOTE:  Not very efficient - you may wish to preflight this, or perhaps it should check
-     * for trouble chars before calling the replace functions.
-     *
-     * @param s The string to be quoted.
-     * @return A copy of the string, having undergone quoting as described above
-     */
-    public static String imapQuoted(String s) {
-
-        // First, quote any backslashes by replacing \ with \\
-        // regex Pattern:  \\    (Java string const = \\\\)
-        // Substitute:     \\\\  (Java string const = \\\\\\\\)
-        String result = s.replaceAll("\\\\", "\\\\\\\\");
-
-        // Then, quote any double-quotes by replacing " with \"
-        // regex Pattern:  "    (Java string const = \")
-        // Substitute:     \\"  (Java string const = \\\\\")
-        result = result.replaceAll("\"", "\\\\\"");
-
-        // return string with quotes around it
-        return "\"" + result + "\"";
-    }
-}
\ No newline at end of file