Hi,

Let me share my experience.
I run a mail server with some 1000 users & growing.
I needed:

* a web interface for IMAP
* that requires no database
* a free software.

After trying many, I found the following worth mentioning:

1. Postman (http://www.uv.es/postman/postman.html)
just needs a webserver with cgi capabilities
pros: extremely efficient - even on low hardware, no cookies
cons: difficult to install (need to configure & compile), can't
change mail password.

2. Squirrelmail (http://www.squirrelmail.org/)
needs a webserver with php capabilities
pros: terrific features with a whole bunch of plugins, easy install
(just needs to copy to web directory & edit config file), change
mail password.
cons: uses cookies for session management
(i'd problems only with IE 5 on Win 98 & Win 2K)

3. Ilohamail (http://www.ilohamail.org/)
needs a webserver with php capabilities
pros: no cookies, easy install (just needs to copy to web directory &
edit config file)
cons: can't change mail password.

I was using Squirrelmail for about an year. Now I changed over to
Ilohamail. Its running fine with no problems. Most of the users have
liked the new interface. Some still use the squirellmail interface.

Regards,
Divyananda M S