Webmail

[mailing at scastagnoli.info]

Hello everyone!
I would realize a webmail system based on Cyrus IMAP.
What can you suggest me?
I've find out these different products that could be usefull for my purposes:
1)
Squirremail
2)
Horde-IMP
3)
Openwebmail

I have set Cyrus to work with ssaslauth authentication style and I would
maintain it.
I would use Horde because it seems there is a gorupware Horde-based that
should be so cool.
It could be fantastic if Horde could interface with MS Outlook to share
contacts and other informaions.
Does anyone have some experiences in that way?

Thakns a lot in advance!!!

Stefano C.