React Native Requires Chilkat v11.0.0+

How to Copy IMAP Mail to another IMAP Server

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

import { Imap, StringBuilder } from '@chilkat/react-native'

async function chilkatExample() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  const imapSrc = new Imap();

  // Connect to our source IMAP server.
  try {
    await imapSrc.connectAsync('imap.example.com');
  } catch {
    console.log(imapSrc.lastErrorText);
    return;
  }

  // Login to the source IMAP server
  try {
    await imapSrc.loginAsync('admin@chilkatsoft.com', 'myPassword');
  } catch {
    console.log(imapSrc.lastErrorText);
    return;
  }

  const imapDest = new Imap();

  // Connect to our destination IMAP server.
  try {
    await imapDest.connectAsync('mail.example-code.com');
  } catch {
    console.log(imapDest.lastErrorText);
    return;
  }

  // Login to the destination IMAP server
  try {
    await imapDest.loginAsync('myLogin', 'myPassword');
  } catch {
    console.log(imapDest.lastErrorText);
    return;
  }

  // Select an IMAP mailbox on the source IMAP server
  try {
    await imapSrc.selectMailboxAsync('Inbox');
  } catch {
    console.log(imapSrc.lastErrorText);
    return;
  }

  // After selecting a mailbox, the NumMessages property will
  // be updated to reflect the total number of emails in the mailbox:
  console.log(imapSrc.numMessages);

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

  // This example will copy the first 10 messages using sequence numbers
  const sbMime = new StringBuilder();
  for (let seqNum = 1; seqNum <= 10; seqNum++) {
    sbMime.clear();
    try {
      await imapSrc.fetchSingleAsMimeSbAsync(seqNum, false, sbMime);
    } catch {
      console.log(imapSrc.lastErrorText);
      return;
    }

    try {
      await imapDest.appendMimeWithFlagsSbAsync('Inbox', sbMime, false, false, false, false);
    } catch {
      console.log(imapDest.lastErrorText);
      return;
    }
  }

  // Disconnect from the IMAP servers.
  await imapSrc.disconnectAsync();
  await imapDest.disconnectAsync();
}