Hello, I am receiving spam which has missing Return-Path and envelope-from (in SPF check):
Return-Path: <> X-Original-To: a...@aaa.aaa Delivered-To: a...@aaa.aaa Received-SPF: Pass (helo) identity=helo; client-ip=185.117.73.75; helo=bjsabbatini.co.uk; envelope-from=<>; receiver=a...@aaa.aaa is there any legitimate reason why email would have empty Return-Path? Is it safe to block it in header_checks? /^Return-Path: <>/ REJECT
