[DECtec] [HECnet] Fwd: [H390-MVS] Yahoo DMARC Implementation Breaks Most Mailing Lists

[Gregg Levine]

Hello!
Actually no. I do know of him, before this however. Incidentally
Google who has e-mail is reliable. Sadly you won't see your messages
unless you get a response but they don't follow that silly ideal that
Yahoo is playing with.
-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."


On Thu, Apr 10, 2014 at 7:17 PM, John H. Reinhardt
<johnhreinhardt at yahoo.com> wrote:
Thanks Greg.   I think that pretty much explains why I don't get back copies
of my posts.   Also why I haven't noticed it until now.   Virtually all of the
newsgroups/lists I subscribe to are Yahoo groups.   HECnet, DECtec and a
couple others are not.   The Yahoo ones are ones I interact with most.
Although I've gotten posts to appear on DECtec sporadically, HECnet has
failed 100%.   I'm also a member at CCTalk and CCTech and I recently had a
post succeed there.   Probably, like most things Yahoo, the DMARC policy
doesn't work 100% of the time.   Well, I was looking around for a new email
host anyway that I can use with some of my owned domains.   I guess this just
forces me to speed the search.

Are you any relation to the John R. Levine mentioned?

John H. Reinhardt


On 4/10/2014 6:46 PM, Gregg Levine wrote:

Hello!
See below. That was just sent to the H390-MVS list. John if you don't
see that here say so.
-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."


---------- Forwarded message ----------
From: <afg0510 at videotron.ca>
Date: Thu, Apr 10, 2014 at 5:32 PM
Subject: [H390-MVS] Yahoo DMARC Implementation Breaks Most Mailing Lists
To: H390-MVS at yahoogroups.com




FYO - on

http://tech.slashdot.org/story/14/04/09/2047205/yahoo-dmarc-implementation-breaks-most-mailing-lists

pdclarry writes: "On April 8, Yahoo implemented a new DMARC policy
that essentially bars any Yahoo user from accessing mailing lists
hosted anywhere except on Yahoo and Google. While Yahoo is the
initiator, it also affects Comcast, AT&T, Rogers, SBCGlobal, and
several other ISPs. Internet Engineering Council expert John R.
Levine, a specialist in email infrastructure and spam filtering, said,
'Yahoo breaks every mailing list in the world including the IETF's' on
the Internet Engineering Task Force (IETF) list.

DMARC (Domain-based Message Authentication, Reporting & Conformance)
is a two-year-old proposed standard previously discussed on Slashdot
that is intended to curb email abuse, including spoofing and phishing.
Unfortunately, as implemented by Yahoo, it claims most mailing list
users as collateral damage. Messages posted to mailing lists
(including listserv, mailman, majordomo, etc) by Yahoo subscribers are
blocked when the list forwards them to other Yahoo (and other
participating ISPs) subscribers. List members not using Yahoo or its
partners are not affected and will receive posts from Yahoo users.
Posts from non-Yahoo users are delivered to Yahoo members. So
essentially those suffering the most are Yahoo's (and Comcast's, and
AT&T's, etc) own customers. The Hacker News has details about why
DMARC has this effect on mailing lists. Their best proposed solution
is to ban Yahoo email users from mailing lists and encourage them to
switch to other ISPs. Unfortunately, it isn't just Yahoo, although
they are getting the most attention."



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