My postfix host is rejecting my client with this message:
4.7.25 Client host rejected: cannot find your hostname, [126.96.36.199].
From the cli on the postfix server, I get this:
root@civicrm:~# host 188.8.131.52 184.108.40.206.in-addr.arpa domain name pointer 220.127.116.11.sinet.com.kh.
So, there is a pointer record. Why would it be rejected.
I then put in a phony hostname in /etc/hosts with the same IP address and the was accepted and email successfully sent.
I then added
18.104.22.168 22.214.171.124.sinet.com.kh to the /etc/hosts file and it was also accepted.
What could be the problem?