On Sat, 08 Jul 2017 00:29:29 -0400 Bill Cole wrote: > 1. Null sender with From & Subject both inconsistent with DSN or > other legit null-sender mail.
In this case it's more a problem with his headers: Return-Path: <> ... X-Envelope-From: <purcha...@eusource.cn> I think that a null sender could be the basis of a useful rule. A few years ago it was fairly common in bulk mail, but that practice has gone now.
