I am a single user person. I set things up for 1 person, and have had no problem doing that with Postfix. I read the README/INSTALL file(s) that come with the package, install according to them, and configure according to them as well. It's about as straight forward as I've found. Shouldn't be too much work even for a n00b as long as you follow the directions very closely.
I do run this on a Slackware 8.1 "Generic" install, so if that makes any bit of difference I figure it'd be worth mentioning...