I have a perplexing problem from my point of view. Not a mail server expert though so here goes;
Using mail-tester.com, done a spam test for my mailserver and it’s telling my PTR record is invalid, but i believe it should be valid, it’s currently in this format;
HELO: domain.org rDNS: server1.domain.org
This should be valid, i have been told it should pretty much be either
the HELO and rDNS can be the same FQDN though?
But I have been told setting both the hostname and rDNS identically the same can cause conflicts.
Not sure which format it should be in?
HELO: example.org rDNS: server1.example.org
HELO: example.org rDNS: example.org
Both your server’s hostname and PTR record should be a fully qualified domain name, e.g.
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