[exim] OT - Webmail options

Sorry for the OT, I was looking at Zimbra for webmail installation, but
didn't expect it not be able to authenticate to the existing
infrastructure (mysql, it's LDAP and AD only). Current installation is
using Squirrelmail, but I'm looking for something a bit more sexy (Zimbra,
gmail, etc) can I get people's suggestions about what they've seen that
they liked?

Thank you.

Derrick MacPherson
dmacpher@???