[CentOS] Best way to have Postfix 2.3 or 2.4 on Centos 4.4?

Greetings,

I would like to install Postfix 2.3 or 2.4 (I need support for SASL
authentication via Dovecot) on a Centos 4.4 server.

I have already found rpm packages at
http://postfix.wl0.org/en/available-packages/ and pages about using
the centosplus repo for postfix.

Before launching rpm or yum, however, I'd like to ask the list which
way you think is the best way to do this. By "best" I mean the way
which:

* has no known issues, gotchas, extra configuration tricks...
* has as little extra dependencies as possible
* can be maintained/upgraded with yum

Thank you in advance for any feedback!

Marco

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