Hello,
thank you for the Feedback. I'll contact the receiver's postmaster and
tell them the RFC violation.
To work around this you can set an smtp_reply_filter:
/etc/postfix/main.cf:
smtp_reply_filter = pcre:/etc/postfix/smtp_reply_filter.pcre
/etc/postfix/smtp_reply_filter.pcre
/^220 mx.XXX.YYY ESMTP/ 550 They won't talk to us
Wouldn't that stop delivery to that MTA at all? Can I workaround the
issue with a similar filter in a way that only the 5xx response to a
EHLO leads to a bounce?
Best Regards,
Michael.
