Autentification users before send mail

Dear Sirs!
We're using Kolab 2. The problem is through our mail-server
there is a lot
of spam (outgoing). I can't find the PC's (users) which
send it. How can I
setup autentification user before sending email? Where I can
read smth?
Thank you.

Maxim Sorokin



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Am Mittwoch, 5. April 2006 17:21 schrieb Maxim Sorokin:
> We're using Kolab 2. 

Please be more specific. Kolab2 is a solution.
What kind of server and clients are you using?

> The problem is through our mail-server there is a lot 
> of spam (outgoing). I can't find the PC's (users)
which send it. How can I
> setup autentification user before sending email? Where
I can read smth?

All Kolab Server I know have the default setting that
clients can only
connect and send out email with strong encryption and
authentification.
Email traffic is logged in the postfix log (below
/kolab/var/postfix/log/).

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