Unable to send email with reply-to not set error

Tested patch for the above issue

I have the same issue.
The patch fix the problem.

This patch wasn't applying cleanly for me so I updated it for latest 3.6.

My mistake, was not applying due to another patch being applied.

The last submitted patch, 4: unable_to_send_email_with_reply_to_not_set_error-3410890-4.patch, failed testing. View results →

For Acquia Platform Email, reply-to header is required or you will get this error (Amazon SES service). The patch made this work, although I do not understand why you have to uncheck 'Disable site email notification' to get reply-to to be set. Can't it just be set by default to the site mail that is sending the message out and not include the site mail as a (main) recipient?

       $recipient = '';
      $reply_to = NULL;
       if (!$notification->disableSiteMail()) {
         $recipient = \Drupal::config('system.site')->get('mail');
        $reply_to = $recipient;
    }

Why not simply $reply_to = \Drupal::config('system.site')->get('mail');?