Issue Reverse DNS does not match SMTP Banner

[Davide Maggiorelli]

I was setting certificates and DNS and the only issue I get from MX lookup that cannot get rid of is: "Reverse DNS does not match SMTP Banner".

If I telnet I get:

$telnet mail.<domain>.<tld> 25

Trying <IP Address>...
Connected to mail.<domain>.<tld>.
Escape character is '^]'.
220 <domain>.<tld> ESMTP Postfix

(so I get the domain without "mail")


RDNS are set to mail.<domain>.<tld> (If I set them to <domain>.<tld> MX lookup tells me "Reverse DNS is not a valid Hostname").

I have multiple domains on Plesk with different IPs and I set the option "Send from domain IP addresses and use domain names in SMTP greeting" because I don't want different domains to be identified in the same way.

I searched a lot and found a lot of people with the same problem, but no solution, so is there a solution to this problem?

Thank you!

 

[ChristophRo]

set myhostname to "mail.domain.tld" in /etc/postfix/main.cf and restart the postfix service

 

[Davide Maggiorelli]

set myhostname to "mail.domain.tld" in /etc/postfix/main.cf and restart the postfix service

Thank you ChristophRo
I already tried this, but it's not solving the problem for the other domains.