I'm new to this site but I have found many good answers on this site before. I have also searched for my actual question but I didn't found the answer or at least I didn't understand what should I do for that.
The topics I have already read:
Reverse DNS does not match SMTP Banner
SMTP Reverse DNS Mismatch Reverse DNS does not match SMTP Banner
https://stackoverflow.com/questions/31542300/reverse-dns-does-not-match-smtp-banner
And many more I found on google.
Problem :
We have a dedicated server with 16 IP addresses, we use 4 IP addresses actually, 1 is main IP, 2 for NS's and 1 for mail server.
So in our DNS config file we have :
lynxis-sa.eu. 86400 IN NS ns01.lynxis-sa.eu.
lynxis-sa.eu. 86400 IN NS ns02.lynxis-sa.eu.
ns01.lynxis-sa.eu. 14400 IN A IP2
ns02.lynxis-sa.eu. 14400 IN A IP3
ptr00.lynxis-sa.eu. 14400 IN A IP1
ptr01.lynxis-sa.eu. 14400 IN A IP2
ptr02.lynxis-sa.eu. 14400 IN A IP3
ptr03.lynxis-sa.eu. 14400 IN A IP4
lynxis-sa.eu. IN A IP1
localhost.lynxis-sa.eu. IN A 127.0.0.1
lynxis-sa.eu. IN MX 0 smtp.lynxis-sa.eu.
lynxis-sa.eu. IN MX 10 mail.lynxis-sa.eu.
smtp.lynxis-sa.eu. 14400 IN A IP1 (For ssl)
mail.lynxis-sa.eu. 14400 IN A IP4
Hostname : s1.lynxis-sa.eu
The Reverse for each IP is correctly set on IP manager as same you can see here.
I manage a VPS with exactly same configuration but with one IP and everything is ok. But on this server, with every MX Lookup on http://mxtoolbox.com, I get the warning message "Reverse DNS does not match SMTP Banner".
For info: we use Centos 6 and Centos Web panel.
Thank you for your help in advance :)
For other people who may have same problem, the answer is :
Postfix SMTP banner show multiple hostnames