- π¬π·Greece perarg
After two years from the latest post, there is a new module in play, Drupal Symfony Mailer β , which replaces the whole Drupal mailing system and the module mailsystem, is used as a replace of Swift Mailer.
So the https://www.drupal.org/project/mailsystem/issues/3166149 β is not applicable any more. But the issue that @introfini explains, especially in #2 is crucial.Should be opened a new issue based on newly module Drupal Symfony Mailer and start the conversation from scratch?