Mailserver on another server

Virtualmin
1

Hello guys!

I’m new on virtualmin, but I’m liking to use that software much more than CPanel…very easy and flexible.

My question here is about to make a separate server for mail. I read about that and see that Virtualmin doesn’t support that feature, but I can install Virtualmin on both servers and add manually the same domain on that. Right? I will separate my setup:

  • Server 01
    Centos 6.x 64bits
    Virtualmin
    Nginx
    MariaDB
    PHP-FPM (RealGecko plugin, thanks!)

  • Server 02
    Centos 6.x 64bits
    Virtualmin

Here is my questions:

1 - DNS Records are made all on the Server 01?
2 - DNS Slave are made on the Server 02? Just Slave right?
3 - MX Records is poiting to Server 02 IP?
4 - And about the SPF Records, how I have to do?
5 - DKIM Setup is made on Server 01 or Server 02?

Thanks for the atention, and sorry for the bad english.