Return-Path: <existing@bar.com> From: Foo Bar <existing@bar.com> To: category@bar.com Subject: This is a topic from an existing user Date: Fri, 15 Jan 2016 00:12:43 +0100 Message-ID: <32@foo.bar.mail> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Authentication-Results: example.com; dmarc=fail Hey, this is a topic from an existing user ;)