How to tag emails with symfony/mailer and symfony/mailgun-mailer provider

Question

In my project where I use Mailgun to send emails, I want to tag emails as described here. But I can't find how to do that with symfony/mailer and symfony/mailgun-mailer provider and can't find any documentation about that, can anyone help me with this?

Answer 1

I find the solution and want to share it with other developers. I add "X-Mailgun-Tag" header and it works.

$message = (new TemplatedEmail())
      ->from(new NamedAddress($senderEmail, $senderName))
      ->to(new NamedAddress($receiverEmail, $receiverName))
      ->subject($subject)
      ->htmlTemplate($template)
      ->context($context);

$message->getHeaders()->addTextHeader('X-Mailgun-Tag', $tag1);
$message->getHeaders()->addTextHeader('X-Mailgun-Tag', $tag2);