Courier or Cyrus

[Hans du Plooy <hansdp@sagacit.com>]

Hi guys,

I have to setup a mail server/cluster (dunno yet what kind of hardware I'll 
have at my disposal) for a company wanting to add e-mail to their current 
service offering.   Initial userbase is 400,000 with a projected groth of 
around 10% pa.

My main concern is what to use for pop3/imap.  My experience with courier-imap 
has been very very good so far, but I've never had to offer pop3/imap for 
this big a userbase.

Initially it will only be imap, linked to a web interface (through wap, 
actually) - no pop3 or direct imap, so I don't expect the volume of mail to 
be too big.

So what would serve me better?  What are the unique advantages of either 
courier and cyrus in a situation like this?  And when load increases?

Thanks
-- 
Kind regards
Hans du Plooy
SagacIT (Pty) Ltd
hansdp at sagacit dot com