(PHP using ActiveX) Send High Priority Email (SMTP, X-Priority header)

Demonstrates how to send high-priorty email (or lower priority email) by setting the X-Priority header field.

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<?php

//  The mailman object is used for sending and receiving email.
$mailman = new COM("Chilkat.MailMan2");

//  Any string argument automatically begins the 30-day trial.
$success = $mailman->UnlockComponent('30-day trial');
if ($success != 1) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

//  Set the SMTP server (obviously, use your SMTP server, not chilkatsoft.com)
$mailman->SmtpHost = 'smtp.chilkatsoft.com';

//  Set the SMTP login/password (if required)
$mailman->SmtpUsername = 'myUsername';
$mailman->SmtpPassword = 'myPassword';

//  Create a new email object
$email = new COM("Chilkat.Email");

$email->Subject = 'This is a test';
$email->Body = 'This is a test';
$email->From = 'Chilkat Support <support@chilkatsoft.com>';
$email->AddTo('Chilkat Admin','admin@chilkatsoft.com');
//  To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

//  To send high-priority email,
//  add the X-Priority header field with the value "1"
//  to indicate highest-priority.
//  A value of "3" is normal, which is the same as not setting
//  the X-Priority header at all, and "5" is the lowest.
//  "2" and "4" are in-betweens.

//  Microsoft Outlook might add the following headers when
//  sending high-priority email.

//  X-Priority: 1 (Highest)
//  X-MSMail-Priority: High
//  Importance: High

//  The X-Priority header alone is enough to make the email high-priority.

$email->AddHeaderField('X-Priority','1');

//  Call SendEmail to connect to the SMTP server and send.
//  The connection (i.e. session) to the SMTP server remains
//  open so that subsequent SendEmail calls may use the
//  same connection.
$success = $mailman->SendEmail($email);
if ($success != 1) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

$success = $mailman->CloseSmtpConnection();
if ($success != 1) {
    print 'Connection to SMTP server not closed cleanly.' . "\n";
}

print 'Mail Sent!' . "\n";
?>