Pol Hallen:
> Hi folks!
> 
> I'm newbie and I study postfix
> 
> What I should be use to (check) and block attempt spam from my lan to
> internet?

Welcome (that's a funny email address BTW).  Here are some suggestions
for software that is often used with Postfix:

- Use a content filter, so that your clients cannot send out known
malware. http://www.ijs.si/software/amavisd/

- Use per-client rate limits, so that an infected client cannot
send too much mail. http://www.postfwd.org/

        Wietse

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