WARNING: These are scams. They are Emails sent to a honeytrap address only ever used for this purpose. Do not reply to these people, they will try to con you into paying out money in return for nothing.
CAVEAT: Please note that some of these Emails may be impersonating a genuine company or person. We wish to make it clear that any such name mentioned within these Emails has no connection to the scam. For the sake of searching, we leave these messages untouched, but we will respond to any concerns left in our comments.
From: "Dr.John Davis" <firstname.lastname@example.org>
Date: Tue, 31 Oct 2017 15:10:18 -0700
Subject: Have you received your money???
GOOD-DAY MY DEAR,
HAVE YOU RECEIVED YOUR MONEY??? YOUR PAYMENT IS READY FOR YOU.
GET BACK TO US IMMEDIATELY TO PROCEED.