mail.domain.com shows server.domain.com page. how can i change it?

[hknerdr]

Hello,

I have a problem with smtp server. I can send and receive mails, have no problem but, when i check with mxtoolbox.com supertool it shows smtp as server.domain.com.

Also when i go to mail.domain.com it shows server.domain.com text.

Anyway to fix this?

Thanks