One more plea for you to turn on the "header munging' switch on your MAILMAN server, so that valid messages from DMARC-protected domains won't get suppressed by recipients who honor DMARC. Sample results under the current regime appear below -- the "munging" switch fixes this at no cost to anything.
> [email protected] > DMARC Forensic Report for macsrwe.com from IP 204.128.250.1 > To: Domain Admin <[email protected]> > A message claiming to be from you has failed the published DMARC policy for > your domain. > > Sender Domain: macsrwe.com <http://macsrwe.com/> > Sender IP Address: 204.128.250.1 > Received date: Sat, 15 Apr 2023 00:21:26 +0200 > SPF Alignment: no > DKIM Alignment: no > DMARC Results: Reject > > ------ This is a copy of the headers that were received before the error was > detected. > > X-DKIM-Failure: bodyhash_mismatch > Received: from mailhost.omnigroup.com <http://mailhost.omnigroup.com/> > ([204.128.250.1]) > by mx264.antispamcloud.com <http://mx264.antispamcloud.com/> with > esmtps (TLSv1.3:TLS_AES_256_GCM_SHA384:256) > (Exim 4.92) > (envelope-from <[email protected] > <mailto:[email protected]>>) > id 1pnRnJ-000Gyx-IV > for [email protected] <mailto:[email protected]>; Sat, 15 Apr 2023 > 00:21:25 +0200 > Received: from mailhost.omnigroup.com <http://mailhost.omnigroup.com/> > (mailhost.omnigroup.com <http://mailhost.omnigroup.com/> [204.128.250.1]) > by mailhost.omnigroup.com <http://mailhost.omnigroup.com/> (Postfix) > with ESMTP id 0F1692E8C519; > Fri, 14 Apr 2023 15:21:12 -0700 (PDT) > DKIM-Filter: OpenDKIM Filter v2.10.3 mailhost.omnigroup.com > <http://mailhost.omnigroup.com/> 0F1692E8C519 > Authentication-Results: mailhost.omnigroup.com > <http://mailhost.omnigroup.com/>; > dkim=fail reason="signature verification failed" (2048-bit key; > unprotected) header.d=macsrwe.com <http://macsrwe.com/> [email protected] > <mailto:[email protected]> header.b=Dn4BbY/S > X-Original-To: [email protected] <mailto:[email protected]> > Delivered-To: [email protected] <mailto:[email protected]> > X-Greylist: delayed 999 by SQLgrey-1.8.0
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