Nov 21 2018 05:30 AM
Hi,
We are seeing DMARC Failure reports from LinkedIn when they receive an Automatic Reply from an Office 365 user.
It seems to fail DKIM and therefore DMARC but if I turn on Automatic Replies and send a test from an external sender such as Gmail, I can't replicate the issue. SPF, DKIM and therefore DMARC all 'PASS'.
Does anyone know why the LinkedIn emails are affected?
These emails are sent by the Mailbox Rules Agent and I note that the Return-Path/MAIL FROM field are blank. Others have mentioned this being a cause, but I'm not so sure.
Thanks
Feb 13 2019 06:39 AM
Mar 13 2019 01:57 AM
Hi Ryan,
I posted a similar question on Spiceworks https://community.spiceworks.com/topic/2176966-dkim-dmarc-and-linkedin?page=1#entry-8258861 and received some helpful replies. I can't say I've digested the info yet but this might help you.
Thanks
Mar 13 2019 04:27 AM