Re: [Asrg] What are the IPs that sends mail for a domain?
Daniel Feenberg <feenberg@nber.org> Wed, 17 June 2009 15:24 UTC
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Date: Wed, 17 Jun 2009 11:17:24 -0400
From: Daniel Feenberg <feenberg@nber.org>
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Subject: Re: [Asrg] What are the IPs that sends mail for a domain?
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On Wed, 17 Jun 2009, Steve Atkins wrote: > > On Jun 16, 2009, at 4:17 PM, Daniel Feenberg wrote: >> Because it would be impossible to maintain a DNSBL for IPV6, > > I keep hearing people say this, but I've not seen any clear justification for > it. It seems to me to be no more difficult to run a blacklist for IPv6 > addresses than IPv4 addresses (neither is easy, but the details of the > address representation don't seem to make more than minor differences). > > Can you expand on why you think it's the case, or point me at some discussion > of it? Of course a spammer could reuse an IPV6 address, and then a DNSBL could catch subsequent spam from that address. But there isn't any need to reuse IPV6 addresses - they are nearly infinite in number, each customer is assigned billions by default and there is no real need for the spammer to restrict himself to his officially listed addresses. IPV4 DNSBL work, even though they are "listing badness" because IPV4 address space is finite. That means that "listing badness" isn't really different from "listing goodness". But if badness is infinite, then listing bad addresses won't be effective. Note that my argument that MTAs with only IPV6 won't be established is not contradicted by the existence of MTAs with IPV6 and IPV4 connectivity. Nor does it really depend on the difficulties with DNSBLs, although that is an additional obstacle. The major obstacle is the limited connectivity that an IPV6 only MTA would have. Daniel Feenberg > > Cheers, > Steve > > _______________________________________________ > Asrg mailing list > Asrg@irtf.org > http://www.irtf.org/mailman/listinfo/asrg
- [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