On Dec 5, 2004, at 9:21 AM, Chris Mason wrote:
I'm looking for feedback on experiences of implementing an enterprise mail
server with IMAP and webmail, preferably groupware, on our Dual Xeon Fedora
server. We currently have sendmail, uw-imap, squirrelmail, in standard
Redhat configuration, and we are having huge load problems as the present
setup is not capable of supporting the needs of our users. Large mail
folders bring the server to it's knees. We only have 25 users but they
travel and use the mail system as a filing system, routinely saving 10MB
emails and never cleaning up old mail.
I have a hard time categorizing 25 users as an Enterprise environment. If the current configuration is meeting your feature requirements, I would focus on where your performance bottleneck(s) lie. There is no reason why the average colocated server (dual Xeon exceeds my definition of such) shouldn't be able to handle that load. At first glance, it sounds like you might be running into the performance limitations of mbox.
What kind of testing have you done? What size are you "large mail folders"? Have you tried maildir instead? I've been quite happy with Postfix/Courier servers, but I can't give you an accurate recommendation without a better idea of your current limitations.
We also need more groupware type features such as file sharing, messaging
and calendaring. I am looking at Binari, Groupwise, Surgemail, and
opengroupware which would involve more work to implement for me.
We've started looking at Open-Xchange (http://mirror.open-xchange.org/ox/EN/community/) for groupware solutions. The demo is very impressive, and the price can't be beat.
-- Jason Dixon DixonGroup Consulting http://www.dixongroup.net
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