From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 31662 invoked by alias); 29 Nov 2016 16:19:46 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 30988 invoked by uid 89); 29 Nov 2016 16:19:45 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.6 required=5.0 tests=BAYES_00,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=no version=3.3.2 spammy=Its, bounced, H*UA:6.3, H*MI:sk:90156ed X-HELO: mail-wm0-f49.google.com Received: from mail-wm0-f49.google.com (HELO mail-wm0-f49.google.com) (74.125.82.49) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 29 Nov 2016 16:19:35 +0000 Received: by mail-wm0-f49.google.com with SMTP id a197so242397821wmd.0 for ; Tue, 29 Nov 2016 08:19:34 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to; bh=xl08pFN8M4t1HuKlmO8vY+xXhc1f+FP+YfWqLOjRbQk=; b=YJy3Jm3aYBnOsSox8470AW501SRL4gHSjkBvWyfU3h4Lrkcq3QVs/Lyi4hPO8JtgAz GyM7Pdyrf471IHMcDNvFtVixhbjZYXMVVVZ+pcOkhkJyIIU7UmO5J9P1NlELvKptSGsm 54LyD+Rwu1sBDQC9/ptxGYeP9rmZgx0tfjGJw72YAaIC3M+4XIO+GE50KVbbLei1ARqY yYvMs+/kiGqIHiM3kErXDdBqtsGGjHGaWGqbJK+2ObOjQtHBYo8CmNxSg0lxAr3K3z/b CoH2nCuAXoka5FCUSpyznG4a2uApn1DOjRkxvXJQTdPpBaNQEBFNJjuVeOQi+pqjW1GR msZg== X-Gm-Message-State: AKaTC014KQ11h6R+34lIny0n94Allj/KSQtUJJfervcy/r68eV25bz6LUZW1PvQ00FHWQA== X-Received: by 10.28.142.16 with SMTP id q16mr23348834wmd.35.1480436373023; Tue, 29 Nov 2016 08:19:33 -0800 (PST) Received: from [192.168.1.202] ([164.215.120.147]) by smtp.gmail.com with ESMTPSA id 63sm3569487wmg.2.2016.11.29.08.19.31 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Nov 2016 08:19:32 -0800 (PST) Subject: Re: DMARC - gmail.com or is it yahoo.com To: cygwin@cygwin.com References: <90156ed9-3ba3-3563-5f90-b6424041acca@gmail.com> From: David Macek Message-ID: <24dbf7dd-8c45-b5cc-ad31-198ab61128ce@gmail.com> Date: Tue, 29 Nov 2016 17:50:00 -0000 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <90156ed9-3ba3-3563-5f90-b6424041acca@gmail.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms030806030406070301000403" X-IsSubscribed: yes X-SW-Source: 2016-11/txt/msg00328.txt.bz2 --------------ms030806030406070301000403 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-length: 2700 On 29. 11. 2016 15:24, cyg Simple wrote: > I find this excerpt from cygwin-help a bit confusing. Notice the > "yahoo.com" in the "Remote host said:" message. What's really going on > here? Why is yahoo.com doing the authentication for a gmail.com address? >=20 > > Received: (qmail 130602 invoked for bounce); 17 Nov 2016 10:26:04 -0000 > Date: 17 Nov 2016 10:26:04 -0000 > From: MAILER-DAEMON@sourceware.org > To: cygwin-return-205832-@cygwin.com > Subject: failure notice >=20 > Hi. This is the qmail-send program at sourceware.org. > I'm afraid I wasn't able to deliver your message to the following address= es. > This is a permanent error; I've given up. Sorry it didn't work out. >=20 > : > User and password not set, continuing without authentication. > 173.194.202.27 failed after I sent the message. > Remote host said: 550-5.7.1 Unauthenticated email from yahoo.com is not > accepted due to domain's > 550-5.7.1 DMARC policy. Please contact the administrator of yahoo.com > domain if > 550-5.7.1 this was a legitimate mail. Please visit > 550-5.7.1 https://support.google.com/mail/answer/2451690 to learn about = the > 550 5.7.1 DMARC initiative. e69si30940847pfk.231 - gsmtp > >=20 Reading and understanding email bounces is notoriously hard. I got the same email, just with my email address instead of yours. The prob= lem is not related to the recipient's address, but to the sender's address.= A quick query to got me the original messag= e that bounced. Its headers follow. > Date: Wed, 16 Nov 2016 04:25:22 -0500 > From: Ian Lambert > To: cygwin@cygwin.com,Marco Atzeri > Subject: Re: Resend: pdfseparate does nothing for me? > Message-ID: <8C630CDB-03CD-4388-B8AC-7C2A033BEF67@yahoo.com> > MIME-Version: 1.0 > Content-Type: text/plain; charset=3Dutf-8 > Content-Transfer-Encoding: quoted-printable What happens is that ezmlm (the mailing list software) broadcasts this mess= age (after adding a bunch of links at the bottom) to everyone subscribed, b= ut with the sender unchanged. Yahoo has got a DMARC policy set up that is s= upposed to ensure that only Yahoo servers can send messages marked as "from= ...@yahoo.com". As you can see, Google is enforcing the policy and correct= ly rejecting the message as fake (it really wasn't sent by Yahoo, but by So= urceware). This is only going to happen more and more often as email provid= ers up the battle against spam. The best solution is to change the way ezmlm re-sends the messages, I bet t= here's a big discussion about it somewhere on the Internet. --=20 David Macek --------------ms030806030406070301000403 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature Content-length: 5198 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG 9w0BBwEAAKCCCuwwggUCMIID6qADAgECAhAwzJDbT70jeYw1Cb83uS/9MA0G CSqGSIb3DQEBCwUAMHUxCzAJBgNVBAYTAklMMRYwFAYDVQQKEw1TdGFydENv bSBMdGQuMSkwJwYDVQQLEyBTdGFydENvbSBDZXJ0aWZpY2F0aW9uIEF1dGhv cml0eTEjMCEGA1UEAxMaU3RhcnRDb20gQ2xhc3MgMSBDbGllbnQgQ0EwHhcN MTUxMjIzMDgyOTQ0WhcNMTYxMjIzMDgyOTQ0WjBKMSAwHgYDVQQDDBdkYXZp ZC5tYWNlay4wQGdtYWlsLmNvbTEmMCQGCSqGSIb3DQEJARYXZGF2aWQubWFj ZWsuMEBnbWFpbC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIB AQCnUGZaXVaGbHTA2s29ZRn4EWF+mN7cEUhAXNs704Brun7YwopS2xsAVuRq 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