First you need to include the “swift_required.php” file, then you create an instance of the Mailer using any of the Transports (probably Swift_SmtpTransport, Swift_SendmailTransport or Swift_MailTransport). Then you create a a message and send it with the Mailer.

<?php
 
//Include this needed file
require_once '/path/to/swift/lib/swift_required.php';
 
//Start the mailer
$mailer = new Swift_Mailer(new Swift_SmtpTransport('smtp.your-isp.tld'));
 
//Create a message
$message = Swift_Message::newInstance('Your subject', 'Your Message')
  ->setFrom(array('your@address.tld' => 'Your Name'))
  ->setTo(array('someone@address.tld' => 'Person name'));
 
//Send it
$mailer->send($message);