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Thu, 23 Sep 2021 09:15:07 +0000 From: Ali Alnubani To: "announce@dpdk.org" , "users@dpdk.org" , "web@dpdk.org" Thread-Topic: DMARC mitigation in dpdk.org's mailing list Thread-Index: AdewW3J1l7se5gCeQnK/zk7UDHZb2A== Date: Thu, 23 Sep 2021 09:15:06 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dpdk.org; dkim=none (message not signed) header.d=none;dpdk.org; dmarc=none action=none header.from=nvidia.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: f0656ac8-bfaa-45ef-6ee0-08d97e72a2b9 x-ms-traffictypediagnostic: DM4PR12MB5216: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM4PR12MB5167.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: f0656ac8-bfaa-45ef-6ee0-08d97e72a2b9 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Sep 2021 09:15:06.7444 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: +oVPa/cFAJTsSmz+IqjnmBe2dtHGQKyqwL1hgr3dCsw14m251KtrNL5FCLLikRXtxz0lD/yjG86yTriyrDxVEQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5216 X-Mailman-Approved-At: Thu, 23 Sep 2021 14:18:56 +0200 X-BeenThere: announce@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list Subject: [dpdk-dev] [dpdk-announce] DMARC mitigation in dpdk.org's mailing list X-BeenThere: dev@dpdk.org List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi all, Due to the changes that Mailman (our mailing list software) does to posts b= efore distributing them, DKIM and DMARC verification will fail for emails o= riginating from the domains that support them. This causes some posts to go= into spam/quarantine and sometimes completely discarded depending on the d= omain's policy. DKIM (DomainKeys Identified Mail) is a form of email authentication that us= es public key cryptography to digitally sign outgoing emails. Senders add t= his signature to the headers of the email message for the receiving mail se= rvers to validate against. The sender specifies which of the original heade= rs is covered by this signature. DMARC (Domain-based Message Authentication, Reporting, and Conformance) bas= ically allows domains to publish policies that tell receiving mail servers = how to handle DKIM verification failures. Strict policies can be set to eit= her reject (message not delivered to user's mailbox), or quarantine (spam/j= unk) the messages failing them. I would like to propose making some mailing list configuration changes to m= itigate and reduce signature breakage: - Disable prepending subject prefixes (e.g., [dpdk-dev]). Making this change will probably break the rules and filters list members= have for their mailboxes if they filter by the subject prefix. Members can filter by Mailman's List-Id header instead, or by the To/Cc h= eaders. - Disable rewriting the "Sender" header. Mailman replaces this header by default with the list's bounce address to= direct bounces from some broken MTAs to the right destination. - Disable conversion of text/html to plain text. Mailman currently strips MIME attachments and does text/html to plain tex= t conversion. We experimented for a while with these changes in a test list we created (h= ttps://mails.dpdk.org/listinfo/test-dmarc), and we found that they helped i= n mitigating signature breakage. We tested with signed emails from the domains: nvidia.com, broadcom.com, an= d gmail.com. We verified that posts on the test list showed passing DKIM/DM= ARC results in their 'Authentication-Results' header. We plan on making these changes to users@dpdk.org and web@dpdk.org first, a= nd then to the rest of the lists once we make sure there are no unexpected = issues. Any feedback will be appreciated. Thanks, Ali