nanog mailing list archives
Re: DMARC -> CERT?
From: Scott Howard <scott () doc net au>
Date: Mon, 14 Apr 2014 13:10:50 -0700
On Mon, Apr 14, 2014 at 11:24 AM, Jim Popovitch <jimpop () gmail com> wrote:
DMARC hasn't cut down on yahoo spam so far. Yahoo's spam problem was (is?) centered on account hijacks.
I just checked my spam folder for the past month. Out of about 80 messages "from" Yahoo, I can see about 3 that went via Yahoo's mail servers. ie, >90% were/would have been blocked using DMARC. Of course, I'm sure the spammers will simply start changing yahoo.com to somethingelse.com once they realize - but from Yahoo's perspective, that's obviously a positive. Whilst I don't agree with the way that Yahoo has done this (particularly around communication), I think the end result is only going to be positive. At a high level it's no different than when people started rejecting mail from hosts without PTR records, or when ISPs started blocking outbound port 25 - they both caused things to break, and both caused people to have to take action to fix the brokenness, but in the long run they were both hugely positive. Scott
Current thread:
- Re: DMARC -> CERT?, (continued)
- Re: DMARC -> CERT? Laszlo Hanyecz (Apr 14)
- Re: DMARC -> CERT? Valdis . Kletnieks (Apr 14)
- Re: DMARC -> CERT? William Herrin (Apr 14)
- Re: DMARC -> CERT? Miles Fidelman (Apr 14)
- Re: DMARC -> CERT? Laszlo Hanyecz (Apr 14)
- Re: DMARC -> CERT? Christopher Morrow (Apr 14)
- Re: DMARC -> CERT? Miles Fidelman (Apr 14)
- Re: DMARC -> CERT? Florian Weimer (Apr 21)
- Re: DMARC -> CERT? Matthew Petach (Apr 14)
- Re: DMARC -> CERT? Jim Popovitch (Apr 14)
- Re: DMARC -> CERT? Scott Howard (Apr 14)
- Re: DMARC -> CERT? Christopher Morrow (Apr 14)
- Re: DMARC -> CERT? Doug Barton (Apr 14)
- Re: DMARC -> CERT? Christopher Morrow (Apr 14)
- Re: DMARC -> CERT? Jim Popovitch (Apr 14)
- Re: DMARC -> CERT? Doug Barton (Apr 14)
- Re: DMARC -> CERT? Jim Popovitch (Apr 14)
- Re: DMARC -> CERT? Matthew Petach (Apr 14)
- Re: DMARC -> CERT? Doug Barton (Apr 14)
- Re: DMARC -> CERT? Jim Popovitch (Apr 14)
- Re: DMARC -> CERT? Matthias Leisi (Apr 14)