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internetworkers - Re: [internetworkers] spam headache

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Subject: Internetworkers: http://www.ibiblio.org/internetworkers/

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  • From: Steven Champeon <schampeo AT hesketh.com>
  • To: "Internetworkers: http://www.ibiblio.org/internetworkers/" <internetworkers AT lists.ibiblio.org>
  • Subject: Re: [internetworkers] spam headache
  • Date: Mon, 16 Jun 2003 00:28:41 -0400

on Mon, Jun 16, 2003 at 12:21:47AM -0400, Michael Best wrote:
> I own the domain com.org and have it hosted with a web provider on a Cobalt
> Raq machine. Just yesterday I was inundated by thousands of emails from the
> same "guy" addressed every letter combination @com.org. As soon as I
> noticed it, I added a procmail rule to send them to the dev/null can. But
> it still took another hour before the barrage stopped. I'm trying to think
> of way to automatically block something like this in the future. Any ideas?

Sounds like what's known as a "dictionary attack".

You don't mention what mail server software you're running, but most of
the common packages have some sort of rate-limiting mechanism. Do a Web
search for "teergrube".

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