Hi.

I have someone trying to send me email and ASSP is rejecting the email with:

'550 5.0.350 Remote server returned an error -> 502 AUTH not supported'

This is coming from hotmail.com and I need to note that other hotmail.com addresses don't seem to have the issue. Here's what I was sent by the sender (specific details redacted) - any help would be appreciated:

mail.domain.com rejected your message to the following email addresses:

em...@domain.com (em...@domain.com)
Your message couldn't be delivered. When Office 365 tried to send the message, the external email server returned the error below. This is probably due to a problem or policy setting on the recipient's email system.

Check the error for information about the problem. The error might tell you what went wrong and how to fix it. For example, if it says the message was blocked due to a potential virus, try sending the message again without attachments.

For Email Admins
This error was reported by an email server outside Office 365, and if the sender is unable to fix the problem by modifying their message then it's likely that it's a problem that only the recipient's email admin can fix.

Check the error for information about the problem. The error might tell you what went wrong and provide clues for how to fix it. For example, if it says the message was rejected due a Sender Policy Framework (SPF) issue then you'll have to work with your domain registrar to properly configure your SPF record. Check the error for information about where the problem is happening. For example, look for a domain name like contoso.com. This tells you which organization was responsible for the error. The recipient's email server could be causing the problem, or it could be due to a third-party service that your organization or the recipient's organization is using to process or filter email messages. If you can't fix the problem, contact the responsible party's email admin. This could be the recipient's email admin, your smart host service admin, or someone similar. Provide them with the error code and error message from this non-delivery report (NDR) to help them troubleshoot the issue.

Unfortunately, Office 365 support is unlikely to be able to help with these kinds of externally reported errors.


mail.domain.com gave this error:
Remote server returned an error -> 502 AUTH not supported







Diagnostic information for administrators:

Generating server: DM3NAM03HT184.mail.protection.outlook.com

em...@domain.com
mail.domain.com
Remote Server returned '550 5.0.350 Remote server returned an error -> 502 AUTH not supported'

Original message headers:

DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hotmail.com;
 s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version;
 bh=6jodEu0Ju+YlJ9JVsap1/+vSGYj/FE1UUiIy7HLKNPU=;
 
b=VbHBN9ICpHtQ6fsI95f879vZ2x3doLUpKReMzLO5mqSHLVOSKNQ2VtiHPrUEX958WoOa6GghSZ5wxxrFWH3zeL+8EZzD+ONay+BT0+4FkAF5zNBxMQHtpUELYo4yivdJYGPUkLNitWuHKc0bdedHzZRFhYtYYjZT+edu2Bl3EMOTkft59DljKwHdHEJJo1Jm7fBcFR5w9pVz7+csvlUV+CF5jc2nge+U5irkhL/AU8Mnn1NGnWYW6jobnGyKSipBht0zPJ/gDSrxTxE22BI2ThTWPqtA6oVig0oplpGSiVLZLHvDegOWp8ynfwgyLGrBai8HxoTgHi+K2ERD9UTJIw==
Received: from DM3NAM03FT059.eop-NAM03.prod.protection.outlook.com
 (10.152.82.56) by DM3NAM03HT184.eop-NAM03.prod.protection.outlook.com
 (10.152.83.61) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.345.19; Tue, 16
 Jan 2018 23:12:04 +0000
Received: from DM5PR1201MB0203.namprd12.prod.outlook.com (10.152.82.53) by
DM3NAM03FT059.mail.protection.outlook.com (10.152.82.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id
 15.20.345.19 via Frontend Transport; Tue, 16 Jan 2018 23:12:04 +0000
Received: from DM5PR1201MB0203.namprd12.prod.outlook.com ([10.174.107.15]) by
 DM5PR1201MB0203.namprd12.prod.outlook.com ([10.174.107.15]) with mapi id
 15.20.0407.012; Tue, 16 Jan 2018 23:12:04 +0000
From: user <em...@hotmail.com>
To: "em...@domain.com" <em...@domain.com>
Subject: subject
Thread-Topic: subject
Thread-Index: AQHTjxb6mJQ1F5b6tU6Dd9KEnwcEOA==
Date: Tue, 16 Jan 2018 23:12:04 +0000
Message-ID: <dm5pr1201mb0203dc1bff34c2228242fe8bf2...@dm5pr1201mb0203.namprd12.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-incomingtopheadermarker: OriginalChecksum:6330DDEFB518AE52630FD4C5D2D840BAE261931060448AF9CC956EDA34C53F17;UpperCasedChecksum:D5588A595D359D0017D72278817E5AC34153E8ECAC6BDD284ADDCD3F285EB080;SizeAsReceived:6814;Count:44
x-ms-exchange-messagesentrepresentingtype: 1
x-tmn: [ukxialcITiaso5rfjBjHBflM/m3CL0Fo]
x-ms-publictraffictype: Email
x-microsoft-exchange-diagnostics: 1;DM3NAM03HT184;6:oOUHtbOs7mmScJKWIizC3prKBQ4xAgrhhSUL91UvVpH5ANzPW5h/5gtTE+sOmEmY0WkqkMOEbIRI95roQLoPifUeJVZBNjLofcBfktNArH054CBp+sWwiloXLPhLVAxUDQ62ojZVNzXQy163foxgOkahhN2/0rBVi2PcphzAHyfQfcnvOILlHuLyZGoTXGMetxgRx+5NQDnJSH2NPX0PqhFvIxVg9/llGsthC0ckGDyGgR2NYvPng9mngUq2TOgWxmkbPX/ppFcb0Rg8Kb9+2TpzL8emu9z6N0jcF1Vu1HDmB3GW8DCne6euMY4lTlj+tV9goRVcQdG/DSwnZkY+mZiF48N13X/yT9Z/w6nJhoQ=;5:ynXRBDGVtVDU9UWDW8iZqyCGM4FAe1Ahjrq0ZspaI48uThl4oaYZvDbRMi9sbOCsXeK72FVC2n33rs2jetnoxCZ58w+2TEZS1v5Bo6RCkE5lDN7kqxRHZjaK62eVh50YVbypLMow0TPCMV99OLSisGBJFeHzIWsZnW54u2KCUT0=;24:4AmG8QJ+Sti0tJ7Kk4gN56jVSpGuvMw8k9pmcbSgHsucSbNSkaxRMYJLB/CQ/dO/tLo0XFUj2Cnqxj1GswOyO1pS4JHYG9oRsg8qbYXioVE=;7:+e6knhjOT17nzOFNdSOm9qXhj0Csd+id/bQo54cwBSfCHpRv6ao4xZApTJjN4RgLATfdibWHd5keiWl0jSWNRrUZClPufOnInR8+oh+sF2885JsWdKkCjs1oNA7lu5LzGhk9e+rh8dYWvfCM0CqCZc/EnfWQJ/23P4fX/B0lO7sSAp0/4bU447hnerk7Cy0MfulUd+cjVXBNqPWlnMZw0IQgaxHvVeXeF2ed3STvhQMpzW2ocMWHa9G3ItIcG0Zh
x-incomingheadercount: 44
x-eopattributedmessage: 0
x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID7020095)(201702061074)(5061506573)(5061507331)(1603103135)(2017031320274)(2017031324274)(2017031323274)(2017031322404)(1603101448)(1601125374)(1701031045);SRVR:DM3NAM03HT184;
x-ms-traffictypediagnostic: DM3NAM03HT184:
x-ms-office365-filtering-correlation-id: f39dbf67-4ee8-4f49-59da-08d55d368eb1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID444000031);SRVR:DM3NAM03HT184;BCL:0;PCL:0;RULEID100000803101)(100110400095);SRVR:DM3NAM03HT184;
x-forefront-prvs: 0554B1F54F
x-forefront-antispam-report: SFV:NSPM;SFS7070007)(98901004);DIR:OUT;SFP:1901;SCL:1;SRVR:DM3NAM03HT184;H:DM5PR1201MB0203.namprd12.prod.outlook.com;FPR:;SPF:None;LANG:;
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: multipart/alternative;
boundary="_000_DM5PR1201MB0203DC1BFF34C2228242FE8BF2EA0DM5PR1201MB0203_"
MIME-Version: 1.0
X-OriginatorOrg: hotmail.com
X-MS-Exchange-CrossTenant-Network-Message-Id: f39dbf67-4ee8-4f49-59da-08d55d368eb1
X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Jan 2018 23:12:04.6085
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Internet
X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM3NAM03HT184




Farokh
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