I have postfix installed on one computer, with DKIM and SPF working properly. What I'd like to do is start using a different computer instead, with the minimal amount of fuss.

Mail servers have a way of baffling me, but I know there are things with cryptography going on here that I don't fully understand (and I don't really care to - I figured it out when I set up the last computer about a year ago, and am happy not to delve into it again).

Right now, I'm working on the early steps of this process -- installing postfix on the new machine, and getting it going.

Are there specific steps I could take to move the correct configs and key files and such to the new computer?