Reject emails to nonexistent addresses?

[Todd Bourdage]

Leave mailsweeper 

-----Original Message-----
From: MailScanner mailing list [mailto:MAILSCANNER at JISCMAIL.AC.UK] On
Behalf Of Raymond Dijkxhoorn
Sent: Monday, January 17, 2005 9:26 AM
To: MAILSCANNER at JISCMAIL.AC.UK
Subject: Re: Reject emails to nonexistent addresses?

Hi!

> We're getting tons of spam directed at addresses that neither exist, 
> nor ever exist. I'm not sure of the spammers' motivation here...are 
> they hoping to simply spam the "catch-all" account, if it exists? Is 
> there an easy way of somehow rejecting emails destined to nonexistent 
> addresses before they are processed by MailScanner?
>
> We're running Fedora Linux, Sendmail, Procmail, and of course
MailScanner.

How does a spammer know its a nonexistent addresses? They dont, so they
beam up anything they can. To stop this, you can for example use ldap on
your frontend servers and do real time checks with your MTA on your
userbase.

Bye,
Raymond

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