When spammers do this to me, I get a bounced mail due to SPF issues since it really isn't from my server. So maybe something SPF related can do what you want.
Original Message From: ru...@mrbrklyn.com Sent: February 6, 2019 5:45 PM To: postfix-users@postfix.org Subject: Stopping acceptence from unowned networks address as from my domains I got this email, which I thought I set up postfix to block From ru...@mrbrklyn.com Wed Feb 6 06:26:12 2019 Return-Path: <ru...@mrbrklyn.com> X-Original-To: ru...@mrbrklyn.com Delivered-To: ru...@mrbrklyn.com Received: from mail.isentia.asia (mail.mediabanc.ws [203.223.144.88]) by mrbrklyn.com (Postfix) with ESMTP id BE463161132 for <ru...@mrbrklyn.com>; Wed, 6 Feb 2019 06:25:50 -0500 (EST) Received: from fixed-187-189-92-126.totalplay.net (187.189.92.126) by mail.mediabanc.ws (10.61.3.33) with Microsoft SMTP Server id 8.1.240.5; Wed, 6 Feb 2019 15:36:09 +0800 From: BSM <ru...@mrbrklyn.com> To: ru...@mrbrklyn.com Subject: Directorio Empresarial Mexicano 2019 Date: Wed, 6 Feb 2019 01:40:06 -0600 Message-ID: <20190206014006.8f2d6192f98f7...@mrbrklyn.com> MIME-Version: 1.0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-UID: 55347 Status: RO Content-Length: 36872 Lines: 561 This is addressed as me in the From line and came from outside my local network I want domain being accepted From my domain only is it comes from within the local network -- So many immigrant groups have swept through our town that Brooklyn, like Atlantis, reaches mythological proportions in the mind of the world - RI Safir 1998 http://www.mrbrklyn.com DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002 http://www.nylxs.com - Leadership Development in Free Software http://www2.mrbrklyn.com/resources - Unpublished Archive http://www.coinhangout.com - coins! http://www.brooklyn-living.com Being so tracked is for FARM ANIMALS and extermination camps, but incompatible with living as a free human being. -RI Safir 2013
