From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D012BC433E7 for ; Fri, 16 Oct 2020 13:57:43 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2968120848 for ; Fri, 16 Oct 2020 13:57:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="v3wpFgML" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2968120848 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 8B6FA6B005C; Fri, 16 Oct 2020 09:57:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 868926B005D; Fri, 16 Oct 2020 09:57:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7A67C6B0062; Fri, 16 Oct 2020 09:57:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0084.hostedemail.com [216.40.44.84]) by kanga.kvack.org (Postfix) with ESMTP id 63CB66B005C for ; Fri, 16 Oct 2020 09:57:42 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 098643631 for ; Fri, 16 Oct 2020 13:57:42 +0000 (UTC) X-FDA: 77377941564.25.limit14_3a048272721d Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin25.hostedemail.com (Postfix) with ESMTP id 989011804E3A0; Fri, 16 Oct 2020 13:57:41 +0000 (UTC) X-HE-Tag: limit14_3a048272721d X-Filterd-Recvd-Size: 3895 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf01.hostedemail.com (Postfix) with ESMTP; Fri, 16 Oct 2020 13:57:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=n9LU0gJ2yXcqPrP7DHve6d19xJ1MusU1+BA7v3fKYeQ=; b=v3wpFgMLWbNyU8ZacMLpnYbB4N 7nhwa5z2f8S7lJ49/KpQChKPvZKXK8qitcvbMVoPaW0M3X9u5+KexsygDYeM/U7tDtiaEJUKoFKnM piX1kkWG+j31gRVXoGmD1qJnr6ol5gnTNE3/3c3unNwaFHhHZTwuPxVzHe14Z83UZ7Y1xukm8Z9Ky 4IYS4FUe6Ls5Q2UAHegK/mHZFbia6+hOVCrDLudunZWA3L3u56X7HN3P24hV7lvX6MxQk4g6LvfTa NE1XgZchPrXbC3y0ne/3DtxAsvRzBi0+NDnEYxhaooWKRyozkRWvTueI1V5DFXKTVDv+jVx/956+x 1CQkh5/Q==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kTQEg-0004pe-27; Fri, 16 Oct 2020 13:57:34 +0000 Date: Fri, 16 Oct 2020 14:57:33 +0100 From: Matthew Wilcox To: Jason Gunthorpe Cc: Jann Horn , Andrew Morton , linux-mm@kvack.org, bcrl@kvack.org Subject: Re: Emails from kvack.org going into spam Message-ID: <20201016135733.GF20115@casper.infradead.org> References: <20201016135451.GB36674@ziepe.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201016135451.GB36674@ziepe.ca> X-Bogosity: Ham, tests=bogofilter, spamicity=0.055967, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Oct 16, 2020 at 10:54:51AM -0300, Jason Gunthorpe wrote: > Does anyone know who is the admin for kvack.org? That's Ben. Adding cc. > I was cleaning my GMail spam mail box and saw lots of messages from > Jann Horn in the spam filter. Since he is not a spammer I investigated > what is going on. > > I see it is because GMail is flagging all of Jann's messages as having > a DKIM failure and Jann's employeer domain 'google.com' is enforcing a > DMARC policy: > > Authentication-Results: mx.google.com; > dkim=neutral (body hash did not verify) header.i=@google.com header.s=20161025 header.b=UzPVodG7; > spf=pass (google.com: domain of owner-linux-mm@kvack.org designates 205.233.56.17 as permitted sender) smtp.mailfrom=owner-linux-mm@kvack.org; > dmarc=fail (p=REJECT sp=REJECT dis=QUARANTINE) header.from=google.com > > Selecting a message from Jann that went through LKML and kvack: > > https://lore.kernel.org/lkml/20201015000041.1734214-1-jannh@google.com/raw > https://lore.kernel.org/linux-mm/20201015000041.1734214-1-jannh@google.com/raw > > And checking the DKIM: > > $ opendkim-testmsg < raw.lkml > $ opendkim-testmsg < raw.mm > opendkim-testmsg: dkim_eom(): Bad signature > > Confirms that Jann sent the message correctly, but kvack is breaking > the signature while vger is not. The DMARC policy on Jann's email is > causing receivers to junk his email as spam. I expect I'm not the only > one. > > I see that kvack is modifying the message in transit. Notably it > changed the transfer encoding from > Content-Transfer-Encoding: 8bit > to > Content-Transfer-Encoding: quoted-printable > > And mangled the body accordingly. Changing the > Content-Transfer-Encoding definitely breaks the signature. > > This seems to be a fairly big problem - it is extra hard for people to > contribute. Setting up a text based email flow is already hard, but > having to also somehow obtain an email address that doesn't use DMARC > is becoming an increasingly tough bar to clear. > > eg what will people even do if/when Google decides to enable DMARC on > gmail.com as well? > > Is it possible that this list software can be reconfigured to match > the vger lists that do seem to work OK? > > Is moving the list to vger an option? > > Thanks, > Jason >