I'm testing a transport rule that checks the sender address. I want to verify that the sender address being inspected is the envelope address, seen in the header information as X-Env-Sender, I believe.
Am I correct in this?
Another way of putting it is, I want to verify that the sender address being inspected is not the name that appears in the To:/From: field of a client message (which is known simply as the header address).
Running Exchange 2013 on most current CU.
This site explains the difference between both entries: https://www.spamhero.com/support/120008/Envelope_Sender_Vs_Email_Header_To