Rust

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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Rust


// 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.

let mailman = chilkat::MailMan::new();

// Configure the POP3 server connection.
mailman.set_mail_host("pop.example.com");
mailman.set_mail_port(995);
mailman.set_pop_ssl(true);
mailman.set_pop_username("user@example.com");
mailman.set_pop_password("myPassword");

if mailman.pop3_begin_session().is_err() {
    println!("{}", mailman.last_error_text());
    return;
}

// Mark a message for deletion...
if mailman.delete_by_msgnum(1).is_err() {
    println!("{}", mailman.last_error_text());
    return;
}

// ...but end the session without QUIT, so the deletion is NOT committed and the message
// remains in the mailbox.
if mailman.pop3_end_session_no_quit().is_err() {
    println!("{}", mailman.last_error_text());
    return;
}

println!("Session closed without committing the pending deletion.");