Am 18.11.2013 12:43, schrieb E.B.: > My understanding was clients for whom you see this in the logs: > > connect from unknown[1.2.3.4] > > Do not have a PTR/rDNS set up for themselves. However, I recently tested a > connection (using telnet on the client side, connecting to port 25) from a > server that does have rDNS in place, but I still get the "connect from > unknown". > > I did "dig -x 1.2.3.4" on the server for the same IP address and the result > came back with the correct domain name. So why didn't postfix see the host > name? I restarted postfix in case it was caching, but it didn't help. > > I also tried putting this in /etc/hosts > > 1.2.3.4 host.example.com > > That didn't help, either. > > Appreciate any tips.
check your master.cf that chroot is *explicit* set to NO
