I have 2 dedicated servers at my webhost. Server-A is the primary domain server that NS1 and NS2 point to. It hosts mysite.com and www.mysite.com on ISPConfig. Server-B hosts store.mysite.com My question is what do I need to do in ISPConfig on Server-A to allow Server-B to function? I think all I need to do is add an A record on Server-A that has hostname: store and the IP for Server-B. Is that correct? Oh and a bonus question... What do I need to do in postfix on Server-A to allow Server-B to relay mail through Server-A? I assume I need to add Server-B's IP somewhere in the config.