nanog mailing list archives
Re: Misguided SPAM Filtering techniques
From: Valdis.Kletnieks () vt edu
Date: Mon, 22 Oct 2007 13:26:48 -0400
On Mon, 22 Oct 2007 11:30:27 CDT, Al Iverson said:
I log only valid domains used as the PRA or MFROM in the spam I receive, about 10k/day. Counting valid domains only, each domain is only seen on about three different spams, when averaged out. That's a hell of a lot of domains that actually exist, and I think a more accurate assumption is that a significant nonzero amount of that backscatter does actually reach a recipient mailbox on the other end.
It would be interesting to know how your numbers get changed if you look for stuff sent with "domain tasting" domains. Sure, it was a valid domain - for all of 48 hours before it got returned because it was starting to "taste bad"....
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Current thread:
- Re: Misguided SPAM Filtering techniques, (continued)
- Re: Misguided SPAM Filtering techniques Tony Finch (Oct 22)
- Re: Misguided SPAM Filtering techniques D'Arcy J.M. Cain (Oct 21)
- Re: Misguided SPAM Filtering techniques Dave Pooser (Oct 21)
- Re: Misguided SPAM Filtering techniques D'Arcy J.M. Cain (Oct 21)
- Re: Misguided SPAM Filtering techniques Sean Figgins (Oct 22)
- Re: Misguided SPAM Filtering techniques Patrick W. Gilmore (Oct 22)
- Re: Misguided SPAM Filtering techniques Sean Figgins (Oct 22)
- Re: Misguided SPAM Filtering techniques Valdis . Kletnieks (Oct 22)
- Re: Misguided SPAM Filtering techniques Sean Figgins (Oct 22)
- Re: Misguided SPAM Filtering techniques Dave Pooser (Oct 21)
- Re: Misguided SPAM Filtering techniques Al Iverson (Oct 22)
- Re: Misguided SPAM Filtering techniques Valdis . Kletnieks (Oct 22)
- Re: Misguided SPAM Filtering techniques Dave Pooser (Oct 22)
- Re: Misguided SPAM Filtering techniques Sean Figgins (Oct 22)
- [admin] Re: Misguided SPAM Filtering techniques Alex Pilosov (Oct 22)
- Re: Misguided SPAM Filtering techniques Suresh Ramasubramanian (Oct 21)
- Re: Misguided SPAM Filtering techniques Al Iverson (Oct 22)
- Re: Misguided SPAM Filtering techniques Sean Donelan (Oct 21)