(PHP Extension) 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 version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

// The mailman object is used for sending and receiving email.
$mailman = new CkMailMan();

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

// Set the SMTP login/password (if required)
$mailman->put_SmtpUsername('myUsername');
$mailman->put_SmtpPassword('myPassword');

// Create a new email object
$email = new CkEmail();

$email->put_Subject('This is a test');
$email->put_Body('This is a test');
$email->put_From('Chilkat Support <support@chilkatsoft.com>');
$success = $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 != true) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

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

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

?>