Rust Requires Chilkat v11.0.0+

Mark IMAP Email as Read/Unread (Seen/Unseen)

Demonstrates how to mark emails as read or unread. Rust

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let imap = chilkat::Imap::new();

// Connect to an IMAP server.
// Use TLS
imap.set_ssl(true);
imap.set_port(993);
if imap.connect("imap.example.com").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

// Login
if imap.login("myLogin", "myPassword").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

// Select an IMAP mailbox
if imap.select_mailbox("Inbox").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

// Set PeekMode so that downloaded messages are not
// automatically marked as seen.
imap.set_peek_mode(true);

// The NumMessages property contains the number of messages 
// in the currently selected mailbox.
let num_msgs = imap.num_messages();
if num_msgs == 0 {
    return;
}

let email = chilkat::Email::new();
for i in 1..=num_msgs {
    // Download each email by sequence number (not UID)
    if imap.fetch_email(false, i as u32, false, &email).is_err() {
        println!("{}", imap.last_error_text());
        return;
    }

    // If desired, mark the email as SEEN.  There are two
    // ways to do it:

    // 1) Set the flag directly by using the sequence number
    // Indicate that we are passing a sequence number and
    // not a UID:
    let b_is_uid = false;
    // Set the SEEN flag = 1 to mark the email as SEEN,
    // or set it to 0 to mark it as not-seen.
    if imap.set_flag(i as u32, b_is_uid, "SEEN", 1).is_err() {
        println!("{}", imap.last_error_text());
        return;
    }

    // 2) Alternatively, we can use the email object.
    // When an email is downloaded from the IMAP server
    // Chilkat will add a "ckx-imap-uid" header to the email.
    // This makes it possible to know the UID associated with
    // the email.  (This is not the sequence number, which may change
    // from session to session, but the UID which does not change.
    // The SetMailFlag method is identical to SetFlag, except
    // it gets the UID from the ckx-imap-uid header.
    // For example:
    if imap.set_mail_flag(&email, "SEEN", 1).is_err() {
        println!("{}", imap.last_error_text());
        return;
    }

}

// Disconnect from the IMAP server.
let _ = imap.disconnect().is_ok();