How can one set the priority of an email when using SwiftMailer in PHP?

To set the priority of an email when using SwiftMailer in PHP, you can use the setPriority() method on the Swift_Message object. This method accepts an integer value representing the priority level, with 1 being the highest priority and 5 being the lowest. By setting the priority of an email, you can indicate to the recipient the importance of the message.

// Create the message
$message = (new Swift_Message('Subject'))
    ->setFrom(['email@example.com' => 'Your Name'])
    ->setTo(['recipient@example.com' => 'Recipient Name'])
    ->setBody('This is the message body');

// Set the priority of the email
$message->setPriority(1); // 1 being the highest priority

// Send the email using SwiftMailer
$mailer->send($message);