On 2021-06-14 12:33, Zenny wrote:
9137:Jun 14 11:49:37 mail postfix/smtpd[14632]: NOQUEUE: reject: RCPT
from mail-lf1-f49.google.com[209.85.167.49]: 451 4.3.5
<drbi...@universityofsweden.se>: Recipient address rejected: Server
configuration problem; from=<drbi...@gmail.com>
to=<drbi...@universityofsweden.se> proto=ESMTP
helo=<mail-lf1-f49.google.com>
postconf -nf
to get future help, but since this is shorewall you should only post
this to postfix maillist and take it from there, if you provide postconf
in private mail i can help solve the rest
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