I am trying to identify, why some of my e-mails are being marked as spam by recipients, and have therefore set up SPF and DKIM. In order to check that they can be verified, I set up aggregated DMARC reports.
When looking at one report, I can see the following:
x.x.x.x
1
none
pass
fail
known-domain.com
known-domain.com
selector1
pass
completely-unkown-domain.com
none
Is there any way to tell, where the domain from the auth_results>spf>domain field comes from? It is unknown to me and not related to any Microsoft Outlook related domains (which is hosting my E-Mails).
Any help identifying the source for the unknown domain would be appreciated.
thanks!
http://dlvr.it/SjQrKP
G:7-Security (Cyber Security Research and Global Information Security Services)
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