SMTP...

Hi there.
i hope you wont find my question weird..

where im working i have a proxy server that use as mail server too... (MDAEMON if you know it..)
some user here went nuts.. they sending file from 2mb up to 40mb(!!) by email.
and they revice this size of files too.
what i wanna do is to write some app that will listen to the smtp and will prevent this file from entering the server.
(delete them or something else..)

any idea how to do so???
i never programed for pop3 nor smtp.
many thanx
kishk91


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