Dart

End a POP3 Session Without Committing Deletions

Demonstrates the Chilkat MailMan.Pop3EndSessionNoQuit method, which closes the POP3 connection without sending the QUIT command. Pending deletion marks are not committed — messages marked with DELE during the session remain in the mailbox. This example marks a message for deletion and then abandons the session so the deletion does not take effect.

Background: POP3's deferred-deletion model effectively gives you a transaction: marks made with DELE are only applied when the session ends with QUIT. Ending without QUIT is therefore a rollback — useful if an error occurs mid-processing and you'd rather leave the mailbox untouched than risk deleting messages you failed to handle. Use Pop3EndSession when you do want the deletions committed.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the MailMan.Pop3EndSessionNoQuit method, which closes the POP3 connection
  // WITHOUT sending the QUIT command.  Pending deletion marks are not committed -- messages
  // marked with DELE during the session remain in the mailbox.

  final mailman = CkMailMan();

  // Configure the POP3 server connection.
  mailman.mailHost = 'pop.example.com';
  mailman.mailPort = 995;
  mailman.popSsl = true;
  mailman.popUsername = 'user@example.com';
  mailman.popPassword = 'myPassword';

  try {
    mailman.pop3BeginSession();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Mark a message for deletion...
  try {
    mailman.deleteByMsgnum(1);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // ...but end the session without QUIT, so the deletion is NOT committed and the message
  // remains in the mailbox.
  try {
    mailman.pop3EndSessionNoQuit();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Session closed without committing the pending deletion.');
}