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(Java) How to Copy IMAP Mail to another IMAP Server

Demonstrates how to copy the entire contents of an IMAP mailbox to another IMAP server.

Chilkat Java Downloads

Java Libs for Windows, Linux, Alpine Linux,
MAC OS X, Solaris, FreeBSD, OpenBSD,
Raspberry Pi and other single board computers

Java Libs for Android

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkImap imapSrc = new CkImap();

    // Connect to our source IMAP server.
    boolean success = imapSrc.Connect("imap.someMailServer.com");
    if (success != true) {
        System.out.println(imapSrc.lastErrorText());
        return;
        }

    // Login to the source IMAP server
    success = imapSrc.Login("admin@chilkatsoft.com","myPassword");
    if (success != true) {
        System.out.println(imapSrc.lastErrorText());
        return;
        }

    CkImap imapDest = new CkImap();

    // Connect to our destination IMAP server.
    success = imapDest.Connect("mail.example-code.com");
    if (success != true) {
        System.out.println(imapDest.lastErrorText());
        return;
        }

    // Login to the destination IMAP server
    success = imapDest.Login("myLogin","myPassword");
    if (success != true) {
        System.out.println(imapDest.lastErrorText());
        return;
        }

    // Select an IMAP mailbox on the source IMAP server
    success = imapSrc.SelectMailbox("Inbox");
    if (success != true) {
        System.out.println(imapSrc.lastErrorText());
        return;
        }

    // After selecting a mailbox, the NumMessages property will
    // be updated to reflect the total number of emails in the mailbox:
    System.out.println(imapSrc.get_NumMessages());

    // The emails in the mailbox will always have sequence numbers
    // ranging from 1 to NumMessages.

    // This example will copy the first 10 messages.
    // We'll leave it up to you to write code to copy
    // the entire sequence range in reasonable size chunks.
    int startSeqNum = 1;
    int msgCount = 10;

    CkStringArray sa;
    sa = imapSrc.FetchSequenceAsMime(startSeqNum,msgCount);
    if (imapSrc.get_LastMethodSuccess() != true) {
        System.out.println(imapSrc.lastErrorText());
        return;
        }

    int i;
    for (i = 0; i <= sa.get_Count() - 1; i++) {
        success = imapDest.AppendMime("Inbox",sa.getString(i));
        if (success != true) {
            System.out.println(imapDest.lastErrorText());
            return;
            }

        }

    // Disconnect from the IMAP servers.
    success = imapSrc.Disconnect();
    success = imapDest.Disconnect();
  }
}

 

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