Multiple mail server

Hello everyone,

I have been trying to install multiple mail domain on the same server and so far only one seems to be able to receive mailserver SSL (checkTLS). Is there any guid on how to do it ? I have followed the guide to put multiple IP on the same cyberpanel explanation to have website with a dedicated IP address. Since it has a dedicated IP address I though i would be able to dedicate this IP and a rDNS to a mail server but it looks like mail server ssl isn’t working for this additional IP. Also making a mautic installation and sending SSL to this new website seems to have only self signed SSL.

I wonder if anyone with more competent than me can guide me through having a functional secondary mail server on an additional IP address as well as functional SSL certificate for those.

Hope you all have an excellent day ahead.