Whats the best these days (MUST have a web interface, and must NOT be horde). Must also run on BSD !!
http://openwebmail.org/ + http://www.postfix.org/ :?:
Zimbra (http://www.zimbra.com/)?
Open source, email, web interface, exchange-like groupware facility, optional Outlook connector which has to be paid for.
Dont know if it runs on BSD but worth a look.
I went for Scalix in the end !