So you want mail in two places? I don't understand to combination of the terms "instead" and "as well as".
The user will save their mail to an alternat place? This really doesn't make any sense.
I agree. Not sure the thought process behind it. :)
NFS doesn't do authentication. Samba does, Cyrus does, PAM does, etc... Storeing you mail in a filesystem is just *DUMB* anyway. Setup an IMAP server.
I appreciate the help.