Mail-server config

[Johannes Weiss <weissi@tux4u.de>]

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Hi @all,
I plan to install a mailserver for ca. 800 users, now I planned to make 800 
users with shell /bin/bash, home /dev/nul,...
So, I ask you ;)), if this is a good solution, to make 800 UNIX-users for a 
mailserver and if not what's the best solution (security reason)

Thnx,
Weissi
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