nanog mailing list archives
Re: Misguided SPAM Filtering techniques
From: Sean Figgins <sean () labrats us>
Date: Mon, 22 Oct 2007 16:28:37 -0600
Dave Pooser wrote:
I call BS. I ran sender-callout verification on my primary email server for a while (before I became convinced it was mildly abusive, and stopped) and typically blocked 2-3 spams per day. In fact, I had more FPs than legit spam blocked by that method.
2-3 spams a day? That's really an amazing low number. You can call BS all you want. I'll stick to my numbers as they are what my reports were telling me. Is it possible that the email address in question was listed somewhere on the list that viruses used to send forged email more than other spammers? That's completely possible. Still, my results are what I observed when I went looking at the statistics over a 6 month period. I was actually looking for other statistics, the reduction in overall spam levels after implementing gray listing, which was the next 6 month's statistics.
Absolutely I am. If you're going to try to offload your spam filtering to me, I want the process to cause you as much pain as possible (within ethical limits, which is why I won't forward your email
It's OK, really, as I;m sure that your email address is only used once or twice total, so your validation of the email address really means nothing to the recipient. They get one spam message. If they get more, they just blacklist the address. It's what I do.
Sender callouts will verify addresses without requiring any action from the end user. If you must [ab]use my resources to do your job, please have the common decency to use my (abundant) hardware and software resources rather than my (much more limited) wetware resources.
You have more information on this? I'd be more than happy to investigate another method myself that does not piss you off so much, as long as it provides the same level of isolating spam.
-Sean (Please respond only to the list)
Current thread:
- Re: Misguided SPAM Filtering techniques, (continued)
- 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)
- Re: Misguided SPAM Filtering techniques Adrian Chadd (Oct 23)
- Re: Misguided SPAM Filtering techniques Owen DeLong (Oct 23)