I have been trying to set up email hosting for my domain benporter.co.uk with your service

here is a screens shot of the DNS records I have setup:

I am able to send out emails from ben@benporter.co.uk

but when I send email to this address from an exterior address to the above address I get 'undeliverable' back with the following error message:

mx.zohomail.com gave this error:
Remote server returned an error -> 553 Relaying disallowed

Diagnostic information for administrators:

Generating server: DB5EUR03HT008.mail.protection.outlook.com

ben@benporter.co.uk
mx.zohomail.com
Remote Server returned '550 5.0.350 Remote server returned an error -> 553 Relaying disallowed'

Original message headers:

Received: from DB5EUR03FT020.eop-EUR03.prod.protection.outlook.com

 (10.152.20.57) by DB5EUR03HT008.eop-EUR03.prod.protection.outlook.com

 (10.152.20.246) with Microsoft SMTP Server (version=TLS1_2,

 cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.1101.12; Mon, 5

 Jun 2017 12:02:35 +0000

Received: from LO1P123MB1282.GBRP123.PROD.OUTLOOK.COM (10.152.20.58) by

 DB5EUR03FT020.mail.protection.outlook.com (10.152.20.134) with Microsoft SMTP

 Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id

 15.1.1101.12 via Frontend Transport; Mon, 5 Jun 2017 12:02:35 +0000

Received: from LO1P123MB1282.GBRP123.PROD.OUTLOOK.COM ([10.167.29.22]) by

 LO1P123MB1282.GBRP123.PROD.OUTLOOK.COM ([10.167.29.22]) with mapi id

 15.01.1143.018; Mon, 5 Jun 2017 12:02:34 +0000

From: Benjamin Porter <benporter1989@hotmail.co.uk>

To: Me <ben@benporter.co.uk>

Subject: Beb

Thread-Topic: Beb

Thread-Index: AQHS3fOdW6H4TIo3gESoR34dgb989Q==

Date: Mon, 5 Jun 2017 12:02:34 +0000

Message-ID: <LO1P123MB12823A0FF357426126BC1277FCCA0@LO1P123MB1282.GBRP123.PROD.OUTLOOK.COM>

Accept-Language: en-GB, en-US

Content-Language: en-GB

X-MS-Has-Attach:

X-MS-TNEF-Correlator:

authentication-results: benporter.co.uk; dkim=none (message not signed)

 header.d=none;benporter.co.uk; dmarc=none action=none

 header.from=hotmail.co.uk;

x-incomingtopheadermarker: OriginalChecksum:5A9DB53AEE6D958F968C692C325FF8B2ACA16977108A1E69C10F1293F45F2D8D;UpperCasedChecksum:5DA88CF0C5ACE3D1FC35641A1919E3815EC73838268D69046C4A93FBC7B26BBA;SizeAsReceived:7977;Count:43

x-ms-exchange-messagesentrepresentingtype: 1

x-tmn: [+czXscF//1SrwUTNvqfIeyBCbxlcxtCbjGCHoW6binI=]

x-ms-publictraffictype: Email

x-microsoft-exchange-diagnostics: 1;DB5EUR03HT008;24:ca4faE313D1vLYImnCaeRMfV4sioCic6AM/EOp+GM4gF+P4oNys8pW+xHQsyxqar7TGIhWoAez8lVtPzty8SbltsqLM81PBgcUBR26pTVJA=;7:0c2D1tPj4kFokILWf6Ir2YTvoIonSJ+geZc0VQO4U7Z8+EcarBZ7vUkELMv1fUckygwn0XHMcJn9qJKxrDnsfwqPaY5JvMkRnZpJQplu0TNJlt4agamoVg2hId4eBLEBFCPCDTYbq8EFu/zPIsvxmx7/iX6iQyQf+cqGxId6NNNQI9oCnfWLYOsEvRGg3Qn18ELoq+70Ecg7Uldj1L+9W9S+xUxmmlLVRdRCmhwbPkALMwSxX26SI9Bv2G6bSWgGU+mgj9JDrNxESCVNgmROLHjUBXYom2lAE6cGHA36GqxnC9+LrSIVPXI0YTqRHLEF

x-incomingheadercount: 43

x-eopattributedmessage: 0

x-forefront-antispam-report: EFV:NLI;SFV:NSPM;SFS:(7070007)(98901004);DIR:OUT;SFP:1901;SCL:1;SRVR:D