Hello everybody! I see following *maillog* records when new mail comes to server
connect from unknown [209.85.223.195] client=unknown[209.85.223.195] But that IP address is GMail IP and it has valid PTR-record which points to *mail-io0-f195.google.com <http://mail-io0-f195.google.com>* My main.cf is here <https://pastebin.com/eyGUeN2U> *resolv.conf* content for Postfix listed below # Generated by NetworkManager nameserver 8.8.8.8 nameserver 8.8.4.4 nameserver [hosting_dns_servers_here] # NOTE: the libc resolver may not support more than 3 nameservers. # The nameservers listed below may not be recognized. nameserver 1.1.1.1 nameserver 1.0.0.1 nameserver 77.88.8.8 nameserver 77.88.8.1 So, how can I force Postfix to make reverse lookup and logs a domain name of mailserver not IP address? I'm running CentOS 7.4 And at the second where I can read about postfix reverse lookup process? May be you would point me to some place in the postfix sources, I don't know, indeed... I guess it's some kind of internal issue of my VDS provider. Caused by the internal network architecture of dedicated server hoster. Anyway, I want to read postfix source code which related to reverse DNS lookup procedures and try to understand, why it doesn't work as expected in my case.
