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.
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?
Andreas
Am 10.03.2025 um 21:20 schrieb Wietse Venema via Postfix-users:
Andreas Kuhlen via Postfix-users:
I have two mail servers that use different content transfer encodings
for the same content. Based on the configuration, I can't work out
why this is the case.
When Postfix bounces an 8bitmime message, then the bounce message
will also be 8bitmime.
Otherwise, the encoding is chosen by the mail sending software,
and Postfix is just the messenger.
Wietse
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