dbmail or dovecot

[Just E. Mail]

This question is going to be difficult  for many to answer, but please 
help.

I am trying to setup a Master/Client server setup to run Postfix. The 
MASTER server has Postfix & PostgreSQL Client installed on it. The 
Master machine is at the backend with PostgreSQL Server installed on it.

All emails will be held on the backend PostgreSQL Server, which is only 
accessible from the Postfix/PostgreSQL Server. I hope you get the picture.

I am trying to determine whether I use 'dbmail' or 'dovecot'? I am new 
to both of these applications & they both seems interesting. I am a 
NEWBIE so it is important to know which one of these two application is 
easy to install, setup, maintain & feature rich. It will be nice to see 
URL of a site or Screen shots to see how each of them look. I am sure I 
am leaving few things out. Please help. I am working on the weekend.

Jennifer