hotmail email issues today?

Matthew Black Matthew.Black at
Wed Jul 9 14:32:54 UTC 2014

If you find users being dropped from mailing lists, it's probably a DMARC issue. Contact your mailing list vendor for appropriate patches.
A brief DMARC primer
DMARC Overview Changes DMARC Policy
Yahoo DMARC Policy Change - What Should Senders Do?
An Update on our DMARC Policy to Protect Our Users
LISTSERV(r) Inventor Develops Seamless Solution to DMARC Hassles

matthew black
california state university, long beach

-----Original Message-----
From: NANOG [mailto:nanog-bounces at] On Behalf Of Jared Mauch
Sent: Wednesday, July 09, 2014 7:09 AM
To: NANOG list
Subject: hotmail email issues today?

Anyone know what happened?  I've started to see a large number of bounces from them (this caused a large number of people with their e-mail hosted there to be removed from mailing lists I host).

Offlist replies/pointers to what I'm doing wrong are welcome.

- Jared

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