Am 27.10.2023 um 15:19:33 Uhr schrieb Cyril - ImprovMX via mailop: > For instance, if my server has a PTR with mail1.example.com, and I > connect by saying "HELO send.example.com". If the receiving server > loads all the IPs for "send.example.com" but doesn't find my server's > IP, should it refuse the email or accept it ?
Because the big companies enforce a correct PTR, almost all servers sending mail have a working PTR. If the PTR mismatches, it is most likely not a normal mail server, so the amount of non-spam coming from such system will most likely be low. The RFC says it should have a PTR record, but there is no must. ftp://ftp.rfc-editor.org/in-notes/rfc1912.html https://serverfault.com/questions/612833/do-internet-standards-require-reverse-dns-for-every-device _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
