[Pkg-exim4-users] user authentication

[Tyler]

Hi all,

I've set exim4 to use it as a simple mta. Since my ISP smtp mail server 
requires smtp authentication, I've put an entry in the passwd.client file.
Everything work fine.

But what is annoying is that everyone on the local machine (any local 
user) can send a mail with the same account.
Could it be possible to have a user (local user) authentication in the 
passwd.client file ?