> Now is the time to clear up something that has confused me - what is
> cyrus and how does it fit into the postfix (or other MTA) scheme?

Postfix (like Exim, like Sendmail) does SMTP.

Cyrus (like Courier) does POP/IMAP

Squirrelmail provides a Web interface for POP/IMAP.

So an incoming message would be received by Postfix and dropped into the
Cyrus datastore (maildir by default I believe).

Then you would come along with Entourage and connect to Cyrus to receive
your mail. When you reply to a message, that would go out via Postfix.
--
Dave Pooser
Cat-Herder-in-Chief
Pooserville.com
"This administration cannot be trusted to govern
if it cannot be counted on to think and, having thought,
to have second thoughts."-- George Will 5/4/04