SSH mail server experiments

["chris Verhagen" <chrisaster24747 () hotmail com>]

A week ago I started a webhosting service for subdomains at 
http://crystal-ninja.cjb.net . Now, ofcourse, people need to ftp into their 
public_html directory in their home dirs. I'm using proFTPd for that.
But now for the problem: I just got the idea to make a funny mail service. 
People should be able to just SSH into my server and instead of a shell, 
/bin/mail is loaded and they can do their thing.
I've encountered problems with that... when experimenting i noticed it 
worked fine to just change /bin/bash in the passwd file to /bin/mail, but 
when i do this, people cant log into the FTP server anymore...
Is there an easy solution for this problem? Remember, i only want them to be 
able to use /bin/mail! No shell!

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