I am using a free outlook account. In the outlook account management portal I have added an alias for my custom domain (alias@mydomain.website). With this I am able to send mails from this alias, which appear in the receivers mailbox as “outlook username” on behalf of “alias@mydomain.website”.
Now I wanted to enable DKIM, SPF and DMARC for my domain. SPF alignment is not possible, since the sending domain (mailfrom) is outlook (even though the from address is @mydomain); after all SPF is concerned with the mailfrom header, right?
DKIM alginment should be possible, and DMARC only requires one of DKIM or SPF to pass, right? If I sign my email with a DKIM signature for mydomain, and then send it through outlook using their SMTP endpoint. This works fine, and it looks the DKIM signature passes verification.
Outlook adds its own DKIM signature when it sends the email.
I read that for DMARC to pass, it is sufficient if only one of the DKIM signatures is valid. Is that corrrect?
When I send an email to another outlook account, then it is successfully received. When I send it to a gmail account, then I get an undeliverable notification with an error that appears to come from Gmail.
I suspected that the DMARC verification is failing, so i checked the message details in outlook. I do not see any proof of the DMARC verification succeeding:
Received: from AM6EUR05HT019.eop-eur05.prod.protection.outlook.com (2603:10a6:102:b4::18) by PA4PR01MB7583.eurprd01.prod.exchangelabs.com with HTTPS via PR3P189CA0073.EURP189.PROD.OUTLOOK.COM; Tue, 6 Jul 2021 21:09:52 +0000 ARC-Seal: i=2; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=pass; b=Bkqoigum5mpWNf+/UXUsQb1vlcGVmHx7FVQGVZKO2Hx+536kELgOwk+lHX8lgwWD5yMldJjJKuszNuBSZtOpwbNe30v3DYPqbo0cynmnwcFf2h5J5usMQt46WFWGlx8PwfO/uJGXwf0zaWfiA744Yxs7xqs1P+kjxdJtIQP+Ed9WG9cJCfOpH3bkcLn6MCvgglqJdjmgMuwGHFQQqMbTicvWlRbNb7H1hqVqHZkESJNGMYd/1fMd3z6pypohQTLsWQvJT3ksRfY3PZhCbzg7/Xdsr9VmpGGqelCQvJIEG209ttBbmYe+F0iD/t1kCpVbHk7pc7OSGKwuvFUEfqo8LA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=E29BlwdZMfPMY/x2ZNEI4qbk/KwR0aB+h7vDCeHZCko=; b=LTsAW7cEd785jZpzjKNlIwiTPUKANweIKmWMJvjUgovBW/fwlHt7rBnkPiNHOyDAITOTThoZWiAk5Wga+PEQlIgvT8xLw37p89GqJ6bUaUyR5CeGwPAOAFBjwCPmsM6nADqGM8I1TjOqWu/Ar15+rzHG9Vf2FBjNaJvc3kbfmJ5/CuvE1QLCX+jVIrFneU82YKD1twgkmG1XjjogfkkpRy6IoEK0mULUgOHTYXzmOUVFl8tm3KSROjVXAlR7WKFy3UBxbK2iZOHd4mFOdauj1KKEZWXT0R1EBuibsMjERJ3kUurp7vHJADOHUosHKgJXsbjRmlEs7lKP5pg3BdORkQ== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 40.92.51.30) smtp.rcpttodomain=outlook.com smtp.mailfrom=outlook.com; dmarc=fail (p=reject sp=reject pct=100) action=oreject header.from=mydomain.website; dkim=pass (signature was verified) header.d=outlook.com; dkim=fail (body hash did not verify) header.d=mydomain.website; arc=pass (0 oda=0 ltdi=1) Received: from AM6EUR05FT008.eop-eur05.prod.protection.outlook.com (2a01:111:e400:fc11::4e) by AM6EUR05HT019.eop-eur05.prod.protection.outlook.com (2a01:111:e400:fc11::214) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20; Tue, 6 Jul 2021 21:09:51 +0000 Authentication-Results: spf=pass (sender IP is 40.92.51.30) smtp.mailfrom=outlook.com; outlook.com; dkim=pass (signature was verified) header.d=outlook.com;outlook.com; dmarc=fail action=oreject header.from=mydomain.website;compauth=none reason=450 Received-SPF: Pass (protection.outlook.com: domain of outlook.com designates 40.92.51.30 as permitted sender) receiver=protection.outlook.com; client-ip=40.92.51.30; helo=EUR06-DB8-obe.outbound.protection.outlook.com; Received: from EUR06-DB8-obe.outbound.protection.outlook.com (40.92.51.30) by AM6EUR05FT008.mail.protection.outlook.com (10.233.240.247) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20 via Frontend Transport; Tue, 6 Jul 2021 21:09:51 +0000 X-IncomingTopHeaderMarker: OriginalChecksum:155CA94B00D6CF049ECCC76BCABD836F57B640A424A2A37BC61703E8D39CE7D7;UpperCasedChecksum:FB7048FAD6C9257C1B47989F3364856FD7E6C9591270B387BBB8B3772B16C4ED;SizeAsReceived:6368;Count:42 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=duc4zgIk/Jt1ldC6UXByHUIuS1WWG/b00juraAve70Id6I7C/S3zWgSCYh7ZN34r+cSlg1ZtjqckdknoYxDyG1TIvF9d7NRWqWoedWd+EQH8oVboL6GOYYJbltKLP6X8adt4wPnDguTsbmQtH53k9BYMztzPR2XglLvEsQPYCSphz43nO5xN8rjJ/JD0vXX+4zQJ0dKjZ6hdPC8ckiTrRprTikxSJYgsDcADp/ISOBy8lzNszWQOD5lFHHOyImXfph4zhEpdcLFO7X+q/akM2ORZS01T5B/3MBWFW9kL2Q2T6qC3g9eh4+OwWYDTRiQi8jglna97yi+Z4057dDR12w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=E29BlwdZMfPMY/x2ZNEI4qbk/KwR0aB+h7vDCeHZCko=; b=A1HO+iF8BAMmfe3A6iTnN6wu1smPgeCt7P6zq2sdP5Gs0Nb1Po5KapruAOkjTcPiD1POxcCUK4EnQDfCkRJrrToYvotCg4d45Gp7PtiwC6PeWuwX1QmAAyIn405Zp+r3Xx+pabz2Kc7+qftLkA2B7AS/K27LMEDkxDQQvp4P1WKxKk1tF1kpT8sLq7lpqBbscvf1VwwCnZtGz6JltzaE11YszuyKyzC47G/jT+zYKzk/bgTPmNRqFjyabP9Gwr5vv9OA/cFNM3LXH8uIkVPpMkiZJVbNR7TDvGtTsuXacmN8WXPyWzf5c8wLGSmOBCEQ/N+tC0m2et569NgNu/tzgA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outlook.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=E29BlwdZMfPMY/x2ZNEI4qbk/KwR0aB+h7vDCeHZCko=; b=mSDCHLTUSeef5H3BvZQqdAsasN7M1RF7Vmz0k0k7UdD/feAUs7XrVioAi0Y8tmEhaDl4eSsGmhGBKWCn1ucajSF2p7VW37cWwVbHVWNZ8W+/+8wg+FhgXyCH74pWkOtTAqFro9dNCghRVX/rfX+tVX0ctCpfbsKluVbw15KUEGXYW/u8o4Rfcwyq51skDv6poJBGxcwTSMlitrcMyjPm4H+J2Df5PuYXDGjOtaX7e32KMJqKR2jO5L0dto+RENPAggniVhil8N4oxtQy+rVGaoiPgNaysWW3Uip/DnWyBN7hBmrhn9uIUOnAcju2htIZDpnA01IA+M0CEYO+mdPf0Q== Received: from AM7EUR06FT032.eop-eur06.prod.protection.outlook.com (2a01:111:e400:fc36::43) by AM7EUR06HT223.eop-eur06.prod.protection.outlook.com (2a01:111:e400:fc36::147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20; Tue, 6 Jul 2021 21:09:51 +0000 Received: from PAXP193MB1358.EURP193.PROD.OUTLOOK.COM (2a01:111:e400:fc36::4b) by AM7EUR06FT032.mail.protection.outlook.com (2a01:111:e400:fc36::343) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20 via Frontend Transport; Tue, 6 Jul 2021 21:09:51 +0000 X-IncomingTopHeaderMarker: OriginalChecksum:A76786EA0F883EA5753C6562EE49A6228D0AA2495AC29764E1692BAA0C03D8EC;UpperCasedChecksum:C3477E719C19B3A77AFC80CF0AB5DF46A6CE63DEA665BDC6C604CBF1FC040355;SizeAsReceived:8946;Count:44 Received: from PAXP193MB1358.EURP193.PROD.OUTLOOK.COM ([fe80::712c:b319:7473:507b]) by PAXP193MB1358.EURP193.PROD.OUTLOOK.COM ([fe80::712c:b319:7473:507b%2]) with mapi id 15.20.4308.020; Tue, 6 Jul 2021 21:09:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; d=mydomain.website; s=1625600110.mydomain; c=relaxed/relaxed; q=dns/txt; i=@mydomain.website; t=1625605791; h=from:subject:to:body; bh=kOUxXEbzUXuxBeyB3VJrIPL2nZgdySsp4QgoGTOJEDo=; b=Kh5zdvDGFo4KiEOmmQIwhZG2cadM3kJteGSso4KXH02afafT7aq6FXWonDkNKGAXmSyK8W2CRPg gFSdN2bSHSA0wy1fwL+LK1r1HaubG4gjLXFVdg266frvuOLRlL6wveO/qa9b9rXqfyWd4XuqsIutw CbpRnc5Acmsp5084fnM= From: ScrubbedName <scrubbed@mydomain.website> Date: Tue, 06 Jul 2021 23:09:51 +0200 Subject: subject Message-ID: <PAXP193MB13584D44BA9B683C7DBE26DFB01B9@PAXP193MB1358.EURP193.PROD.OUTLOOK.COM> To: You <receiver@outlook.com> Content-Type: multipart/alternative; boundary="=-ClmFvQji4xg2/VDJ1Ro0kw==" X-TMN: [EZLm4uJiEHE0uJYZ8jCuKBL6WczNfHe1NnSNOYadXsGJIgmcsiUXWLXMOX6bL9/d] X-ClientProxiedBy: PR3P195CA0025.EURP195.PROD.OUTLOOK.COM (2603:10a6:102:b6::30) To PAXP193MB1358.EURP193.PROD.OUTLOOK.COM (2603:10a6:102:137::18) Return-Path: mydomain@outlook.com X-Microsoft-Original-Message-ID: <CT3QJ1IM6EU4.LTOI4PPHGCV02@MY-LAPTOP> Sender: ScrubbedName <mydomain@outlook.com> X-MS-Exchange-MessageSentRepresentingType: 2 Received: from [IPv6:2a02:1811:8d00:900:b400:b3:e3a5:41c6] (2a02:1811:8d00:900:b400:b3:e3a5:41c6) by PR3P195CA0025.EURP195.PROD.OUTLOOK.COM (2603:10a6:102:b6::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.19 via Frontend Transport; Tue, 6 Jul 2021 21:09:51 +0000 X-MS-PublicTrafficType: Email X-IncomingHeaderCount: 44 X-EOPAttributedMessage: 1 X-MS-Office365-Filtering-Correlation-Id: 2d17d8fd-6783-4c62-dff2-08d940c2654d X-MS-Exchange-SLBlob-MailProps: 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 X-MS-TrafficTypeDiagnostic: AM7EUR06HT223:|AM6EUR05HT019: X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: DnwFVo90bvCuEALpigsSGl+lbTCT2hnrDmUeT2lHBV8PC2ZT5Bk77dEeGgtJUKgJrjmuS6//9kXiTpT4YZLbMksCN9Fs3SZZ8W1NIFf37i/VpzbHilq70KjROIBwcsHNzys7lw1Yfyat0cDoKRqSaZD0bngZufOMkE1zFrfCfdY= X-MS-Exchange-AntiSpam-MessageData: tETETaL0Jb/ywG5niZI/jdn0+hTVsh373tBBDUkw9vOS3fjXZBSf+LtrBgIReEQPHVz1pfnSi4RgG0o9gMjMB3ynSH2QNkpsQGVstvXedHXj3t2u/U0OEFtUB+m6vvRGfbCc8XOfxZxdTtDoPhD6Ec0MMzxeK7k+LlKbcvwe4DxVHVxIKTPg+Dal1cW3v3yGrxaTi4Fyt21ac3o9l77MDg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7EUR06HT223 X-IncomingHeaderCount: 42 X-MS-Exchange-Organization-ExpirationStartTime: 06 Jul 2021 21:09:51.7071 (UTC) X-MS-Exchange-Organization-ExpirationStartTimeReason: OriginalSubmit X-MS-Exchange-Organization-ExpirationInterval: 1:00:00:00.0000000 X-MS-Exchange-Organization-ExpirationIntervalReason: OriginalSubmit X-MS-Exchange-Organization-Network-Message-Id: 2d17d8fd-6783-4c62-dff2-08d940c2654d X-EOPTenantAttributedMessage: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa:0 X-MS-Exchange-Organization-MessageDirectionality: Incoming X-MS-Exchange-Transport-CrossTenantHeadersStripped: AM6EUR05FT008.eop-eur05.prod.protection.outlook.com X-MS-Exchange-Transport-CrossTenantHeadersPromoted: AM6EUR05FT008.eop-eur05.prod.protection.outlook.com X-MS-Exchange-Organization-AuthSource: AM6EUR05FT008.eop-eur05.prod.protection.outlook.com X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-UserLastLogonTime: 7/6/2021 9:00:56 PM X-MS-Office365-Filtering-Correlation-Id-Prvs: eaa2786a-97b7-468f-9644-08d940c264f3 X-MS-Exchange-EOPDirect: true X-Sender-IP: 40.92.51.30 X-SID-PRA: ScrubbedEmail X-SID-Result: FAIL X-MS-Exchange-Organization-PCL: 2 X-MS-Exchange-Organization-SCL: 0 X-Microsoft-Antispam: BCL:0; X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jul 2021 21:09:51.6701 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2d17d8fd-6783-4c62-dff2-08d940c2654d X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-AuthSource: AM6EUR05FT008.eop-eur05.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: Internet X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6EUR05HT019 X-MS-Exchange-Transport-EndToEndLatency: 00:00:00.4428437 X-MS-Exchange-Processed-By-BccFoldering: 15.20.4287.031 X-Microsoft-Antispam-Mailbox-Delivery: abwl:0;wl:0;pcwl:0;kl:0;iwl:0;dwl:0;dkl:0;rwl:0;ucf:0;jmr:0;ex:0;psp:0;auth:0;dest:J;OFR:SpamFilterAuthJ;ENG:(5062000282)(90000117)(91040095)(91045095)(9050020)(9075021)(9100313)(5061607266)(5061608174)(4900115)(2008001114)(2008000189)(210498285)(4920090)(6355004)(4950131)(4990090)(9140004);RF:JunkEmail; X-Message-Info: qoGN4b5S4yoCUafXde0BFQjw4HZO4FAecJR80+3Opp48Bcvxlv0ZQ179/iIaJwO/49zRXV14kKxi5uwoBF6uz1c4L1r7ljJivtmaGJHslC8mXAhVC2uHOYseUJlUYH8WKLkOnX4Sfe/ENUOICXPM2u3uDEnNqQr4rUaKgbOHbGPiCCaCVou9bLzXnnVOO8wx7prg2owIp6KB4lX3lfOnSw== X-Message-Delivery: Vj0xLjE7dXM9MDtsPTA7YT0xO0Q9MjtHRD0xO1NDTD02 X-Microsoft-Antispam-Message-Info: 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 MIME-Version: 1.0 --=-ClmFvQji4xg2/VDJ1Ro0kw== Content-Type: text/plain; charset=utf-8 body --=-ClmFvQji4xg2/VDJ1Ro0kw== Content-Type: text/html; charset=utf-8 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">body html --=-ClmFvQji4xg2/VDJ1Ro0kw==--As you can see there is alignment between the DKIM signature (d=mydomain.website) and the from address (scrubbed@mydomain.website).
Below is the email that is successfully received by Gmail if temporarily disable my DMARC policy. It contains my DKIM signature, as well as outlook’s. Gmail’s UI says ‘DKIM PASS’ for outlook.com, but it doesn’t mention a check for my custom domain.
Delivered-To: scrubbedreceiver@gmail.com Received: by 2002:a17:907:2094:0:0:0:0 with SMTP id pv20csp930381ejb; Tue, 6 Jul 2021 21:43:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwC/if/jYyRMYXlUaQ7AMe2LuJcRFc/1rLVPxmAtmyTTmgezzrNhfmPYF29s1cpnOCnhlNs X-Received: by 2002:a05:600c:17cf:: with SMTP id y15mr18548974wmo.19.1625632981376; Tue, 06 Jul 2021 21:43:01 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1625632981; cv=pass; d=google.com; s=arc-20160816; b=smXYoK6dYNojIycURp98G42dOuFf1fzqZ13gqKR7vKrJyAeARb+3yRhqwQLb9twl/M O/Cx+4xnYQCJSOGNcm1hqgA3Br+VWVchnXUjWlR1Nnl75+BWTzr2kIH5QCOw0saY44HX ho45Ef4Wy7Mm5wxW+XCZceXzCvYogHcIe6XI/LoG+xNNyTxJn31Si0ZWmEI4yHMl4Qw9 lbqx1N+uXfMrTRzmGk+0cBqYqP1+KbNHiZTKrJ9MI5UY8JbQ5Pxz07FKimuLY/UHugn6 1MYCRqL2DAA5T6Fj5YRl4AGqqHK2jRIrrOx/aT4uqdjeb3bdCT20z5nW99BnfisD8Jf5 9mDw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:mime-version:to:message-id:subject:date:from:dkim-signature :dkim-signature; bh=hb6Z2ytr0+pXoafW+IgYfBAmJD20nxN8YvCMYnvxFHE=; b=GUEz8cY6ePJEFpdorwv06SUpvMs71bSPQ1jKio0I5NutyBJQSKRMW6tq1LyaGfroz9 Q3HcDuHvHNM5LHI9lGdYSlexwc7qrWi/oxOwDQbo984y4EVYgeGwXQZijsUyaBP4fWgJ uXHPRaMZREUJeLT6ucLyuaG5E4YRfSrp3zbB1/CEBpaV7i0Ik+8H/tT9ToxsfaWljN3S cEN/SY1W7wXr2g/t6o884q2yF+daX03UB9EXpARnOKLCe4w728JC0GnmGja17ArF1ppk RE2NswZ4vk/ZFUkUPuJVMtZaRiuUNCiqh5/t9xOwRhym4hetQJM06cUx1SkhxXwHjy80 +KGg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@outlook.com header.s=selector1 header.b=FJ+q7+Wc; dkim=neutral (body hash did not verify) header.i=@mydomain.website header.s=1625600110 header.b=eK9s35kR; arc=pass (i=1); spf=pass (google.com: domain of mydomain@outlook.com designates 40.92.65.57 as permitted sender) smtp.mailfrom=mydomaim@outlook.com Return-Path: <mydomaim@outlook.com> Received: from EUR01-HE1-obe.outbound.protection.outlook.com (mail-oln040092065057.outbound.protection.outlook.com. [40.92.65.57]) by mx.google.com with ESMTPS id x14si20754501wrq.262.2021.07.06.21.43.01 for <scrubbedreceiver@gmail.com> (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Jul 2021 21:43:01 -0700 (PDT) Received-SPF: pass (google.com: domain of mydomaim@outlook.com designates 40.92.65.57 as permitted sender) client-ip=40.92.65.57; Authentication-Results: mx.google.com; dkim=pass header.i=@outlook.com header.s=selector1 header.b=FJ+q7+Wc; dkim=neutral (body hash did not verify) header.i=@mydomaim.website header.s=1625600110 header.b=eK9s35kR; arc=pass (i=1); spf=pass (google.com: domain of mydomain@outlook.com designates 40.92.65.57 as permitted sender) smtp.mailfrom=mydomaim@outlook.com ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=SG4Mb0Avgw4/qemDytqsC3jMCAGK6pKbk/CRyDQBqS+/JkdTSTY7gUPXk/2DVqUgBV75IvlUGzQRYuSVB1az2U0KZyt7oZwGYvsSxYPXynd+M5NKBz0sKiAb0fcTH0s9NoITNILB8ISh8CMDIeHxoSsb6UWYDUV+ZavQcWqZUDBDgmUja81T1dYMkHJY9FPfto0DnQqR/27mQZoonYGER6RgeOgfUY51LoKzjF7zBZbItdjWgiBgW8+9FosCgo3HFVVhNpeKWp7op7TXe3IGBmvCFL9l37/sr6sxKu8Cp70Dx1mrjDjUYJCrDLiAiMpLt9qRAws76AvSrh6Ukquz0g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hb6Z2ytr0+pXoafW+IgYfBAmJD20nxN8YvCMYnvxFHE=; b=NY2zvXPDmh+x+RQv67i+Q1PcURSeAksvR8OOMb4VqCN7bSkNNEEZfFFc4MUpCLHDhETpM0Zl6d5j1OSTmpIOX/lUY1yq9XC3QbpPNnNU4DALqgrGkOjW+h1vuqeg/VbzCd3E4XdxDfyp90uiqtDOdliV0x2Wgn2Pps4aEAGcvX51cg+GazpwRaQjnmE8XemJw/IgnTPygi5MjrT7jQu5hEF5W2cQIk5uOhydHmnVz8pQX+tFV1c9S1C03majpaetoz7hnpfnSyRCdTwBKsicl6eTkd3ZxtXWbxO7MgiRklEWJ2GmYSQ5/OLkAuTzugFn/FqTOj3185JvE5xXhmswLQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outlook.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hb6Z2ytr0+pXoafW+IgYfBAmJD20nxN8YvCMYnvxFHE=; b=FJ+q7+WcGmtkAn0Btp1qxysHlLyhHi/6LmM8Dc6V9+HT4JeVTfT4OX0zTTJZX3cf4HUJbRz9NumrprTa7obnhi4luGbIzvHckrIAeE66YyXldum0jJ8y6gtic/9LgKMDQiFTuQ1HH3m1DR5mjOrTXwROZiMpHtqNB6bMZfsnROKSVjTXYspOoCgjvE5oPlIa8b41knWhoIBuVXrvVIZV+p+twD30DCmOPT7vjl4umep82z10oYc+7R1uUKxLjK3+TaoFs7GG5YbrYp6KDIQe/BADeC5QpfZQNYkkE++HClKWOu57lj7MflmZ9SmCdqPLR86B591DU/N+g8eJdr8RUQ== Received: from DB5EUR01FT011.eop-EUR01.prod.protection.outlook.com (2a01:111:e400:7e1a::44) by DB5EUR01HT041.eop-EUR01.prod.protection.outlook.com (2a01:111:e400:7e1a::397) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20; Wed, 7 Jul 2021 04:43:00 +0000 Received: from AM9P193MB1347.EURP193.PROD.OUTLOOK.COM (2a01:111:e400:7e1a::43) by DB5EUR01FT011.mail.protection.outlook.com (2a01:111:e400:7e1a::259) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20 via Frontend Transport; Wed, 7 Jul 2021 04:43:00 +0000 X-IncomingTopHeaderMarker: OriginalChecksum:25EEE00EE6FFD54104D861910270DDF1D48611A78154C6F4D84836DFFE8594EC;UpperCasedChecksum:74A5E204408D1C8784D282245452FEFD3286CF1C2F2EF2DCD492F1F683B46564;SizeAsReceived:8937;Count:44 Received: from AM9P193MB1347.EURP193.PROD.OUTLOOK.COM ([fe80::e4fe:81cf:b0b:e185]) by AM9P193MB1347.EURP193.PROD.OUTLOOK.COM ([fe80::e4fe:81cf:b0b:e185%6]) with mapi id 15.20.4287.033; Wed, 7 Jul 2021 04:43:00 +0000 DKIM-Signature: v=1; a=rsa-sha256; d=mydomaim.website; s=1625600110; c=relaxed/relaxed; q=dns/txt; i=@mydomaim.website; t=1625632980; h=from:subject:to; bh=fL0+1NbhTSjqJ0H/0+SUEqx9/uBGPgTk5yS5Z/Q1xzY=; b=eK9s35kRa9I8i/gZfmSmCSwoAGG0cvSdQ+sADh2LNJlzzfr2p/GhAyVJOWW1tll4xRLMpgnXPJI phnNd3XyI1Ft1BvD6MzEQH4Oqk+aPRT2eWfUX6Sq33ckzaa2pxiIzJ42hqcnp2MVpubR4NXtTTsHJ NXrm0zJdA8RUuNqtqJQ= From: ScrubbedName <mailer@mydomaim.website> Date: Wed, 07 Jul 2021 06:43:00 +0200 Subject: test Message-ID: <AM9P193MB13472C95C6470FEB6D10FA1CB01A9@AM9P193MB1347.EURP193.PROD.OUTLOOK.COM> To: You <scrubbedreceiver@gmail.com> Content-Type: multipart/alternative; boundary="=-uZJdfUiKv5Tx5228Ly/LxA==" X-TMN: [HugaSFm4/tNTI1mPZgtdp7aO5+UPFM/yz3Km6250XwHmhDzWPmLGp4yAAXkBVsW1] X-ClientProxiedBy: AM4PR0101CA0065.eurprd01.prod.exchangelabs.com (2603:10a6:200:41::33) To AM9P193MB1347.EURP193.PROD.OUTLOOK.COM (2603:10a6:20b:30f::7) Return-Path: mydomain@outlook.com X-Microsoft-Original-Message-ID: <0AEB4YYP6EU4.FK2Y1G90EMX8@LAPTOP> MIME-Version: 1.0 Sender: ScrubbedName <mydomain@outlook.com> X-MS-Exchange-MessageSentRepresentingType: 2 Received: from [IPv6:2a02:1811:8d00:900:b400:b3:e3a5:41c6] (2a02:1811:8d00:900:b400:b3:e3a5:41c6) by AM4PR0101CA0065.eurprd01.prod.exchangelabs.com (2603:10a6:200:41::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.19 via Frontend Transport; Wed, 7 Jul 2021 04:42:59 +0000 X-MS-PublicTrafficType: Email X-IncomingHeaderCount: 44 X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-Correlation-Id: 30ca54aa-a58e-473d-e479-08d94101b2c7 X-MS-TrafficTypeDiagnostic: DB5EUR01HT041: X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: qdCp/04PMyOnjmguZ5rZGp/vhTsH2sjy5vSdz+u0wUBUvtdkI+oXooJzJ3ASo/xMb3E/Degb/RzFsd1LBU4DZxLReXbSrZtvQaM2m3okIzQwxsVeWaEEDJgvg1lbqGXI5TbgPH11rTooM1oQxoV6JIfdQ8sk2OlzrlUPGrKw/yk= X-MS-Exchange-AntiSpam-MessageData: xUWz218NSwGHo0o08q9Ab2N48BoR1CW2K39UCxVYHVeF4R8guccGs7VBvkwp4vSQgY3LCyR5aMONsqyP3/kZD387y2JFTzWKeN+RsL+vHGHzQWyTAgAQj+8bCI0HmlB4m0RSVXeqqGegUqJEBorfaO36b62kdbfRN22e6NUGuZjW+1jhoOxaPuxfVcdcAl0CPZjTP+QuGzX9leHVvtJt+w== X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 30ca54aa-a58e-473d-e479-08d94101b2c7 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jul 2021 04:43:00.2899 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-AuthSource: DB5EUR01FT011.eop-EUR01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: Internet X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB5EUR01HT041 --=-uZJdfUiKv5Tx5228Ly/LxA== Content-Type: text/plain; charset=utf-8 body --=-uZJdfUiKv5Tx5228Ly/LxA== Content-Type: text/html; charset=utf-8 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">body html --=-uZJdfUiKv5Tx5228Ly/LxA==--Any idea on what is happening here?
Answer
you cannot pretend as someone else domain. so you need to relay through outlook.
without proper spf record you cannot send mail out legitimately. most spam filters configured to check spf before accepting mail.
Attribution
Source : Link , Question Author : Jorn Vanloofsvelt , Answer Author : T D S
