I have Mailcow running on two machines (installed in April 2021 and October 2022, respectively), which are identical versions but behave differently. The older one is not providing me the IP (RIP) of the source correctly
OLD: imap-login: Disconnected: Connection closed (auth failed, 3 attempts in 30 secs): user=xxx@xxx.ca, method=PLAIN, rip=172.22.1.1, lip=172.22.1.250,
NEW: imap-login: Disconnected: Connection closed (auth failed, 3 attempts in 14 secs): user=xxx@xxx.ca, method=PLAIN, rip=192.199.248.75, lip=172.22.1.250
All the configs look the same, so I must be missing something, and the only difference is on the old server. When I run “iptables -t nat –list”, I get “table `nat’ is incompatible, use ‘nft’ tool.” But it works on the new server.
Does anyone have any idea how to fix it or point me in the right direction where to look?
Thanks for any help you can give. I want to work on an “impossible travel” script, and this is stopping me