[opensuse] Need suggestions on email server setup

I am wanting to set up an email server, this is my first ever attempt, and I was wondering if anyone has any suggestions on programs to use, ways to set it up. I have the SUSE Linux Bible for SUSE 9.1, bought it from a local bookstore when I first started Linux, and it talks about Postix, Qpopper, and Cyrus but I was wondering if there are better programs now then there was back when that book was written. Thanks in advance!