EmailDiscussions.com - View Single Post - Sender Policy Framework / 3rd party domains / and Sieve

lane · 9 Apr 2018, 04:02 AM

And even if the domain for company B is not explicitly listed in the "Received:" headers, a person could do a reverse lookup manually on the earliest IP addresses and potentially find it out.

9 Apr 2018, 04:02 AM	#5
lane Cornerstone of the Community Join Date: Dec 2005 Location: Kars, NB, Canada Posts: 702	And even if the domain for company B is not explicitly listed in the "Received:" headers, a person could do a reverse lookup manually on the earliest IP addresses and potentially find it out.