How to set header without prefix?

As it was mentioned in the original issue,t:version andt:text mean nothing without thetemplate header.

Ooops. I forgot those.

Is “template” and “amp-html” the only two ‘non-prefixed’ headers?

I think I’ll make an exception for those two then.

Is “template” and “amp-html” the only two ‘non-prefixed’ headers?

recipient-variables, as well.

The current solution requires update every time new headers are added to Mailgun, as the current history of Mailgun tells us that this happens after a while.

It is just a matter of time before the same issue reappears.

Thank you@greedyivan for the review.

I've deprecated passing a header without the "h:" prefix. So we need to "keep up to date" with Mailguns API until Symfony 6.0.

Thank you@Nyholm.

I'm usingSymfony\Component\Mime\Email to create the email:

$email    ->from($from)    ->replyTo($replyTo)    ->to($to);

And I'm gettingUser Deprecated: Not prefixing the Mailgun header name with "h:" is deprecated since Symfony 5.1. Use header name "h:reply-to" instead.
I was wondering where should theh: addition to thereply-to happen.

Excellent question!

I suggest to open up a new issue for that. That way it wont get lost on a closed PR.