The situation it’s the following one I’ve setup MailCow on my DMZ located on 192.168.253.0 it works flawless, but as soon I try to send mails from my local network on 192.168.254.0 it doesn’t work, SMT server always fail. I believe this should be address adding network 192.168.254.0 to mynetworks on postfix.cfg but I’m not so sure.
The MailCow log show this
13/02/2022 21:27:06 info disconnect from unknown[192.168.254.17] ehlo=2 starttls=1 quit=1 commands=4
13/02/2022 21:27:06 info Anonymous TLS connection established from unknown[192.168.254.17]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
13/02/2022 21:27:06 info connect from unknown[192.168.254.17]
13/02/2022 21:27:06 info PASS OLD [192.168.254.17]:61460
13/02/2022 21:27:06 info Look up 192.168.254.17 on whitelist, result 200 DUNNO
13/02/2022 21:27:06 info CONNECT from [192.168.254.17]:61460 to [172.22.1.253]:25
Any advice how to fix this?