Enterprise mail server

[John Burton]

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. 
>  
>
HI Chris,
We're currently using postfix + cyrus-imap + squirrelmail. We have about 
the same number of users many of whom travel on a regular basis. Many of 
our users keep large quantities of mail on the  mail server (several 
hundred MBs is fairly common for a user). Our setup also does spam 
checking/blocking, defanging (removing potential executables) and virus 
checking. We are also using a Dual Xeon system, but ours doesn't even 
seem to be breaking a sweat. We've found the combination of postfix and 
cyrus-imap to provide very good performance..

John

>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. 
>
>If you have spent time researching mail and groupware I would love some
>feedback to save me time and help me find a suitable application.
>
>Chris Mason
>
>  
>