Unable to send mails from my local network to my DMZ Mailcow

aliban

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?

aliban

Well just found the solution so if any one have this problem just edit data/conf/postfix/extra.cf and add your network to mynetworks then docker-compose restart postfix-mailcow to apply the changes and it will work.