I have 2 hosting server and domain.
Let say domain-X is pointed to server-X & domain-Y is pointed to server-Y.
Hosted a site on server-Y & a sub-domain of domain-X is forwarded to domain-Y.
I send mails from the site hosted in the server-Y. But I don't want to use the mail server of the server-Y. I want to use the mail server of server-X.
Is it possible?