XF 1.1 Email bounce?

[Morgain]

I am getting an odd notification apparently from hotmail.

from: dmarcrep@microsoft.com
to: postmaster@housemorgain.co.uk
Subject: Report Domain: MYSITE.co.uk Submitter: hotmail.com Report-ID: <798143f327fd44f59753115af3f797fa@hotmail.com>

Body of email is blank
Attachment: hotmail.com!MYSITE.co.uk!1370829600!1370916000.zip

These emails are coming through my host server account.
They are arriving at the email I use for my XF forum on that domain.
I checked to see if dmarcrep@microsoft.com is one of my members and got no results.
But the notification arrives when there is a post on a forum which has a lot of notifications on it - like an announcements forum.
Maybe it's nothing to do with XF? But if so I need to know to check further.

I googled dmarcrep@microsoft.com and it does throw up results but it's in geek talk -( the discussion messages use dmarcrep AT microsoft.com. )
Doesn't seem to mention a spam or con email.

I'd mark it as spam but worried about my forum notification emails to my members being blacklisted by microsoft.

 

[Biker]

http://www.dmarc.org/

 

[TPerry]

I am getting an odd notification apparently from hotmail.

Does your DNS entry for your domain have an SPF record? If not, this is a neat little tool that will help you configure one. http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/
DKIM information (in a fairly laymans terms) are here.