nanog mailing list archives
Re: Misguided SPAM Filtering techniques
From: "Al Iverson" <aiversonlists () spamresource com>
Date: Mon, 22 Oct 2007 11:30:27 -0500
On 10/22/07, Sean Figgins <sean () labrats us> wrote:
Dave Pooser wrote:Whenever I get one of those, I go ahead and confirm the message so the spam gets through to the end user. I figure if they think I'm gonna filter their mail for free, well, they get what they pay for. :^)And that is probably just fine, as 99% of the true spam comes from email addresses (and often doamins) that either do not exist, or often are not configured to receive email.
Cite? 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. Regards, Al Iverson -- Al Iverson on Spam and Deliverability, see http://www.spamresource.com News, stats, info, and commentary on blacklists: http://www.dnsbl.com My personal website: http://www.aliverson.com -- Chicago, IL, USA Remove "lists" from my email address to reach me faster and directly.
Current thread:
- Re: Misguided SPAM Filtering techniques, (continued)
- Re: Misguided SPAM Filtering techniques Nathan Ward (Oct 20)
- 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)