A second plesk server into slave modules

Hi,

Today I've arranged a Plesk server as second server to overcome all kinds of problems for the first one.

For now i have installed anything and set my vpn to the two servers. Also I've managed that i copied the original server with the migration tool from Plesk.

And now i have also managed that the dns server willing see each other.

But i have to overcome a problem by relaying the mail server to the first server. Are there some workarounds to achieve this.

Also do i want to know if i...

A second plesk server into slave modules