[ale] Mail program questions

[Chris Fowler]

I'm looking for a mail package that support SMTP and POP3.  I can use Sendmail and POP3D but I have 40 users that constantly use email.  I would like a package that also has a web interface to send and receive.  I would like to be able to keep all the mail on the server versus having to download it all.   Does anyone use such a package that can do all this and is free?

Thanks,
Chris