Switch to use Drupal Symfony Mailer

I believe this would mean a transport plug-in for Symfony Mailer Library - i.e. it wouldn't be specific to Drupal, and could be reused anywhere that supports Symfony. It wouldn't have to be a Drupal module.

Thanks for clarifying @AdamPS, and moving Elastic Email and Postmark under a new "Transport plug-ins" on the Drupal Symfony Mailer > Supported modules status → page.

The main reason I created this issue is that emails sent as HTML format maintain HTML tags as expected, but lose line breaks, see 🐛 Impossible to send HTML with plain text email Needs work . For example, the "Reset Password"-email is shown as one long string of text (I added <strong>request</strong> to test HTML, and which worked):

admin, A request to reset the password for your account has been made at Arst.dk. You may now log in by clicking this link or copying and pasting it into your browser: https://example.org/user/reset/1/1695824463/L-0h[...]x3In00 This link can only be used once to log in and will lead you to a page where you can set your password. It expires after one day and nothing will happen if it's not used. -- Example.org team

So I tried installing Drupal Symfony Mailer, to use as a formatter, assuming that this would fix the issue, but discovered there wasn't yet any integration with Postmark.

My hope was that using Drupal Symfony Mailer as Formatter and Postmark as Sender would fix the lost line breaks, but maybe it won't?

@AdamPS: And by the way, since you think a more general transport plug-in for Symfony Mailer Library is needed, I am updating the issue summary and moving this issue there.

Feel free to adjust the issue summary, and make it more precise :)

The plug-ins would not be in this module. They are 3rd party plug-ins for Symfony Mailer Library. You can check where the other similar plug-ins live - maybe it would be somewhere on github.

Ok, then I'll move it back to Postmark, since that's where it's needed for HTML support. (If I understand it correctly)

Sorry, I had a steep learning curve here. But I now understand a little bit more what the task is.