Mail Clients Receive SSL Cert For Server Host Name Instead Of Account Domain

Having some SSL trouble with my VPS... I'm trying to use SSL certificates per domain (with dedicated IP and certificate installed in cPanel) but when a mail client connects to an accounts domain it receives the certificate of the server and complains it doesn't match the domain it connected to. I have found surprising little information about this matter. A thread here talks about the feature being originally implemented (here) but i don't have access to what OP says is the "Original thread" so i'm not sure if that has anything useful. I'm not super experienced with SSL in cpanel and how services aside from Apache handle ssl, but I feel like i've been through every WHM and cPanel configuration page and found nothing of importance. A few things of note: [LIST]

If I connect to the servers hostname it works as intended and the certificate validates fine.

Might be unrelated but I successfully followed some directions here on the forum to fix an issue with the mail server not providing an smtp banner with the domain of the dedicated IP being used to connect on (here)

I installed the domains certificate through the users cPanel successfully, the certificate validates in a browser.

"Send mail from account"s dedicated IP address" is enabled Hopefully i'm just missing something obvious and someone can give me some suggestions, thanks for any help.