It was nice interacting with you and thank you for your patience while working on your request.
Please find below the summary for the Case ID: 19917774
You contacted the support desk as you wanted to know the verification process of the Email which we use in the “Email reply address”.
I have explained all about the email verification process and SAP (Sender Authentication Profile).
Since you confirmed the solution helped resolve the request I am closing this case as closed-resolved.
However, please do not be concerned, if you still need assistance on this issue. For the next 10 days case can be easily reopened and resume where we left off, either by adding a comment to the case from the portal, replying to this email or by calling 1 800-667-6389 (please have your case number handy). You can also create a new case any time from the help & training portal.