Ok,

Been getting more and more emails into my exchange server that are blank. Meaning no sender, no subject, no body. Nadda. They do have header info, and always the RDNS fails, once in a great while it will have some info about the sender.. Twice that has been "easypost.com".

My question is whats the point of sending these? Is there some purpose that they can be used for, other then detecting the actual domain exsists? They dont look like they are being stripped on the way in. Why would someone send these messages repeatedly?


Thanks!