The problem needs some more debuggugging, and here’s the status:
– When the message comes with the headers as follows:
The Latin characters are processed OK into the queue, and displayed
properly. But the autoreply message contains unconverted Latin1 text,
in a message marked with charset=“utf-8”. As a result, the recipient’s
mailer displays some nonsence.
– When the message comes with these headers:
(the same way with charset=“iso-8859-1”) the message loses its content,