AtMail Open, I just know if atmail have free version.
Being curious on how it goes in FreeBSD box, I give it a try as my campus interface.
As usual I try to record it in notepad plus screenshot for guide, perhaps useful
1. Download latest version
mail# wget http://atmail.org/download/atmailopen.tgz
2. Extract and change ownership
mail# tar xvzf atmailopen.tgz
mail# [...]

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