Once again, I need some help from professional guys like you all.
Following the multiserver setup I created 4 virtual servers, which are OK. They are splitted as web (Web & DB), mail and ns1 & ns2.
As I plan to add some more root server to my "network" sooner or later, I thought it would be cool to have a well organized domain structure, like this:
and so on...
Testing the mailserver with MXToolbox I got a rDNS does not match SMTP banner error.
So I had a look at /etc/mailname which is correct, rDNS is set.
I guess the problem is the hostname (is it checked for this?) which is still shown as mail only (but it should be mail.servername). However it does not seem to be possible to add dots in hostname.
Is there any way I can realize my wish with the domain structure or is it simply not possible to have it like this - meaning it must always be mail.domain.tld?
Thank you very much for solving my problem