I've run Postfix and Dovecot on Fedora/Red Hat for the last four years
and would highly recommend that setup.  I've tried others, but I don't
think any of them are quite as good.

For a web front end, I'm going to go with Tony on RoundCube.
Definitely the best looking one you can find!

-Andrew



On Tue, Feb 28, 2012 at 10:27 PM, Tony Yarusso <tonyyarusso at gmail.com> wrote:
> I too am using Postfix and Dovecot - they just work so seamlessly with each
> other in Ubuntu.  The maps are stored in PostgreSQL, spam is handled by
> SpamAssassin, and webmail is done by RoundCube.  SpamAssassin also consults
> the SpamHaus RBL, and there's a plugin for RoundCube to let users train the
> system, with their preferences/whitelists/blacklists also stored in
> PostgreSQL.
>
> - Tony
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