I will also send this to the mailman admins, as obviously this message will be filtered by properly-acting servers. The mailman system is not handling DKIM email properly. DKIM is an anti-mail forgery measure. Using DKIM, my server attests that mail coming from me - directly - must be from my own servers, or it should be rejected as below. Mailing list systems mus change the headers to work properly with DKIM. There is information online on how to get Mailman working properly with DKIM.

Bruce --------- Forwarded message --------- From: no-reply@mx39.antispamcloud.com Date: Thu, Dec 10, 2020 at 9:26 PM Subject: DMARC Forensic Report for perens.com from IP 172.105.152.211 To: bruce@perens.com

A message claiming to be from you has failed the published DMARC policy for your domain.

Sender Domain: perens.com Sender IP Address: 172.105.152.211 Received Date: Fri, 11 Dec 2020 06:26:52 +0100 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 atlanta189.amsat.org ([172.105.152.211] helo= mail-01.amsat.org) by mx39.antispamcloud.com with esmtps (TLSv1.2:AES128-GCM-SHA256:128) (Exim 4.92) (envelope-from amsat-bb-bounces@amsat.org) id 1knaxA-00019o-7v for wa9kje-1@wa9kje.org; Fri, 11 Dec 2020 06:26:52 +0100 Received: from [172.19.199.2] (unknown [172.19.199.2]) by mail-01.amsat.org (Postfix) with ESMTP id 836DD177182; Fri, 11 Dec 2020 05:26:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amsat.org; s=dkim; t=1607664397;

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h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Af+yhXaFyJx9TjxkjmAS1vhD1BfQxwz3yUjPH3TGyRA=;

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b=ElYFoFpDLfJyzFeuUuMRoTbSf/g+btqRD0xV+zM1VMtmkE3i9neBbEPbQcMqRqUEQT+c0D

lNk2T6Sl2IIq0Vw5O9Zl4rt7ruGQFFFl5loC++BsFUum5/5Q5B/P3K3nU0Ql4nLEWsJPJ/ 0TtPLTuHV8yDRmHzmB+MXhP9WFZEVMI= ARC-Authentication-Results: i=1; mail-01.amsat.org; dkim=pass header.d=perens.com header.s=google header.b=untn3cHj; spf=pass (mail-01.amsat.org: domain of bruce@perens.com designates 2607:f8b0:4864:20::52d as permitted sender) smtp.mailfrom=bruce@perens.com Message-ID-Hash: STA7NVENWTVXB5THYNRPYMIYDNE5TXX5 X-Message-ID-Hash: STA7NVENWTVXB5THYNRPYMIYDNE5TXX5 X-MailFrom: bruce@perens.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: AMSAT BB amsat-bb@amsat.org X-Mailman-Version: 3.3.2 Precedence: list Subject: [AMSAT-BB] Re: Mail Server upgrade issues Gibberish List-Id: AMSAT Bulletin Board Mailing List <amsat-bb.amsat.org> Archived-At: < https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org/message/STA7NVE...

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