Re: [Asrg] What are the IPs that sends mail for a domain?
Dotzero <dotzero@gmail.com> Tue, 30 June 2009 17:17 UTC
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Date: Tue, 30 Jun 2009 13:17:31 -0400
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From: Dotzero <dotzero@gmail.com>
To: Anti-Spam Research Group - IRTF <asrg@irtf.org>
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Subject: Re: [Asrg] What are the IPs that sends mail for a domain?
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On Tue, Jun 30, 2009 at 7:11 AM, Rich Kulawiec<rsk@gsp.org> wrote: > On Tue, Jun 30, 2009 at 10:55:04AM +0100, Ian Eiloart wrote: >> However, I do believe that people should take SPF records into account >> when deciding whether to generate bounce messages. > > Despite the ostentatious claims made by its originator ("Spam as a > technical problem is solved by SPF"), SPF has no anti-spam value. > Nor should it be used when deciding whether to generate a bounce: > the answer to that is always "no". It's far better to reject (not > to mention far simpler, with any sane MTA) and thus greatly diminish > the possibility of outscatter/backscatter spam. > > ---Rsk I'm going to agree with Rich that it's better to reject than to bounce. I can't speak to whether SPF has anti-spam value generally but my experience with publishing -all records for a number of well known large sending sites is that it is useful in addressing phishing at the risk of a small amount of breakage. (Different folks will have different thresholds for this type of tradeoff) This is particularly true if used in conjunction with DKIM signing all outbound mail and making an assertion that one signs all mail. For other types of senders YMMV. As far as whether this is empirical or anecdotal, my statements are based on a corpus of approximately 750 million sent emails with analysis of outbound MTA logs for immediate rejects/bounces as well as bounces/DSNs that come in later.
- [Asrg] What are the IPs that sends mail for a dom… Franck Martin
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] What are the IPs that sends mail for a… SM
- Re: [Asrg] What are the IPs that sends mail for a… John Johnson
- Re: [Asrg] What are the IPs that sends mail for a… Daniel Feenberg
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Lyndon Nerenberg
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… Franck Martin
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Franck Martin
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… Franck Martin
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] reject and DSN, was What are the IPs John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Dotzero
- Re: [Asrg] What are the IPs that sends mail for a… Seth
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Paul Russell
- Re: [Asrg] What are the IPs that sends mail for a… Jeff Macdonald
- Re: [Asrg] What are the IPs that sends mail for a… Steve Atkins
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Daniel Feenberg
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Steve Atkins
- Re: [Asrg] What are the IPs that sends mail for a… Lyndon Nerenberg
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… J.D. Falk
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Dotzero
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Rich Kulawiec
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Rich Kulawiec
- Re: [Asrg] What are the IPs that sends mail for a… Rich Kulawiec
- Re: [Asrg] What are the IPs that sends mail for a… Daniel Feenberg
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- [Asrg] Proposed corollary to Godwin's law John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… David Wilson
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… J.D. Falk
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Franck Martin
- Re: [Asrg] What are the IPs that sends mail for a… Steve Atkins
- Re: [Asrg] What are the IPs that sends mail for a… David Nicol
- Re: [Asrg] What are the IPs that sends mail for a… Steve Atkins
- Re: [Asrg] What are the IPs that sends mail for a… Paul Russell
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… der Mouse
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Gordon Peterson
- Re: [Asrg] reject and DSN, was What are the IPs John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] "Affiliation" John Leslie
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Gordon Peterson
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Dotzero
- Re: [Asrg] What are the IPs that sends mail for a… Rich Kulawiec
- Re: [Asrg] What are the IPs that sends mail for a… Steve Atkins
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Seth
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] "Affiliation" Alessandro Vesely
- Re: [Asrg] reject and DSN, was What are the IPs Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] Proposed corollary to Godwin's law mathew
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Rich Kulawiec
- Re: [Asrg] What are the IPs that sends mail for a… Dotzero
- Re: [Asrg] What are the IPs that sends mail for a… John Leslie
- Re: [Asrg] What are the IPs that sends mail for a… John Leslie
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] reject and DSN, was What are the IPs Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Dotzero
- Re: [Asrg] What are the IPs that sends mail for a… John Leslie
- Re: [Asrg] What are the IPs that sends mail for a… Dotzero
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… John Leslie
- Re: [Asrg] What are the IPs that sends mail for a… Dotzero
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] reject and DSN, was What are the IPs John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] reject and DSN, was What are the IPs Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] reject and DSN, was What are the IPs Chris Lewis
- Re: [Asrg] reject and DSN, was What are the IPs Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Steve Atkins
- Re: [Asrg] reject and DSN, was What are the IPs John Levine
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… Chris Lewis
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Chris Lewis
- Re: [Asrg] What are the IPs that sends mail for a… Chris Lewis
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Bill Cole
- Re: [Asrg] What are the IPs that sends mail for a… Ian Eiloart
- Re: [Asrg] What are the IPs that sends mail for a… Alessandro Vesely
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… Peter Koch
- Re: [Asrg] What are the IPs that sends mail for a… Douglas Otis
- Re: [Asrg] What are the IPs that sends mail for a… David Nicol