Andreas Kuhlen via Postfix-users wrote in <cc3eaecb-fc20-4f37-abc0-ae450cf9e...@mandogo.de>: |Thank you very much, Wietse. | |The emails are sent successfully, so there was no bounce. | |Both email accounts are integrated in Thunderbird. One account on server |A, the other on server B. According to your statement, it is the MUA |that determines the content transfer encoding. Why Thunderbird once |chooses 7bit for the account on server A and once chooses 8bit on server |B is not clear to me.
It surely depends on whether server announces 8-bit extension support for one. Then it depends on whether your message goes via a mailing-list. Certain mailing-list software(-configurations) notoriously reencode data; mailman for example into base64, other go 8-bit; this happens regardless of whether the email has a proper MIME encoding or not, it is list (software) policy. |Rspamd is used with Postfix on server B. Is it possible that Rspamd |changes the Content-Transfer-Encoding when 8bit characters are |recognised instead of continuing to use quoted-printable content |transfer encoding? I have no idea. Yet it seems unlikely that a milter changes the entire message MIME structure, and reencodes it accordingly. If a message contains 8-bit characters the program which composes that message has to decide on a content-transfer-encoding of the relevant parts / headers. If the MTA(s) that is (are) then to transfer the message over to the receiver are incapable of the 8bit, then likely bogus things happen. But i can tell you: even the released version of the MIME capable MUA that i maintain does not yet support the 8bit SMTP extension to do that transfer directly via SMTP (not needing local postfix that is), and the program was a bit famous >20 years ago (long before i took maintainership), at least in Germany, being covered by computer magazines and such, and it by then always favoured 8bit content-transfer-encoding, and sent it out like that, and as far as i know noone ever complained about it. (Changing the default content-transfer-encoding was one of the first things i did; the next releasse will support the SMTP extension.) So that is that. --steffen | |Der Kragenbaer, The moon bear, |der holt sich munter he cheerfully and one by one |einen nach dem anderen runter wa.ks himself off |(By Robert Gernhardt) _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
