hi guys,

i am looking for a out-of-the-box webmail solution that i can
integrate with an existing portal to offer email for a large number of
users.
what i have found so far:
- zimbra: a little heavy but neat intarface
- @mail: commercial, interface is not very rich

does anyone have any other ideas? our current platform is
java/mysql/linux based. i want all the users registered on our site to
get an email address without having to register again.

any pointers will be very useful.

thanks
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