Possibility to set mail server domain

[miklosandras]

Dear All,

May I ask you that is it available on any settings to setup a mail server domain? (what will use in the postfix settings and in SSL/TLS Certificates --> Secure server services --> Email server ) Because I have 2 IP, one for the website and keyhelp, and one for the mail server.

Thanks for any help.
Regards, Andras

[BasHeijermans]

You can set it in the postfix config.

Why is that a problem?

By default it will set the keyhelp domain as should.

Bigger issue that you need to set your domain PTR, SPF, DMARC and DKIM properly.

If they are correct in your DNS then it should be no problem what hostname your nameserver has, as long as it's included in the SPF and PTR.