smtp banner not resolving with rDNS Plesk 12 - help please

[femotvaff]

Hello,
Anyone have a solution for
smtp banner resolution problem.

if you have 2 server and a rDNS correctly setted
1 for site
1 as mail server

Smtp banner is not resolved
"Reverse DNS do not match SMTP banner"
So mail goes in spam directly.

Any solutions will be appreciated.
Thank you

 

[femotvaff]

I solved setting hostname of II server (mail server) as mail.mydomain.com

And banner was fixed.