Hi, I am receiving several emails notifying me thag my email has failed to be delivered. Despite me having emailed the same people previously without any issues. 

Any guidance on what to do to help rectify the issue would be much appreciated. Thank you so much. 

Details of 2 different error codes: 

Diagnostic information for administrators:

Generating server: VI1EUR04HT241.mail.protection.outlook.com
Receiving server: VI1EUR04HT241.eop-eur04.prod.protection.outlook.com 

*** Email address is removed for privacy ***
5/19/2018 10:15:30 AM - Server at VI1EUR04HT241.eop-eur04.prod.protection.outlook.com returned '550 5.4.317 Message expired, cannot connect to remote server(450-4.4.317 Cannot connect to remote server [Message=554-kundenserver.de(mxeue112) Nemesis ESMTP Service not available [VI1EUR04FT042.eop-eur04.prod.protection.outlook.com] 450-4.4.317 554-No SMTP service 450 4.4.317 554 invalid DNS PTR resource record, IP=40.92.75.89] [LastAttemptedServerName=Xxxtherapy.co.uk] [LastAttemptedIP=217.72.192.67:25])'
5/19/2018 10:09:48 AM - Server xxxtherapy.co.uk (217.72.192.67) returned '450-4.4.317 Cannot connect to remote server [Message=554-kundenserver.de (mxeue112) Nemesis ESMTP Service not available [VI1EUR04FT042.eop-eur04.prod.protection.outlook.com] 450-4.4.317 554-No SMTP service 450 4.4.317 554 invalid DNS PTR resource record, IP=40.92.75.89] [LastAttemptedServerName=Xxxtherapy.co.uk] [LastAttemptedIP=217.72.192.67:25]'

Original message headers:

Received: from VI1EUR04FT040.eop-eur04.prod.protection.outlook.com
 (10.152.28.59) by VI1EUR04HT241.eop-eur04.prod.protection.outlook.com
 (10.152.28.221) with Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.20.755.15; Thu, 17
 May 2018 10:14:51 +0000
Received: from DB6P193MB0085.EURP193.PROD.OUTLOOK.COM (10.152.28.51) by
 VI1EUR04FT040.mail.protection.outlook.com (10.152.28.125) with Microsoft SMTP
 Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id
 15.20.776.10 via Frontend Transport; Thu, 17 May 2018 10:14:51 +0000
Received: from DB6P193MB0085.EURP193.PROD.OUTLOOK.COM
 ([fe80::e855:5e69:47a5:93b9]) by DB6P193MB0085.EURP193.PROD.OUTLOOK.COM
 ([fe80::e855:5e69:47a5:93b9%13]) with mapi id 15.20.0776.010; Thu, 17 May
 2018 10:14:51 +0000
From: Tania Taylor Hypnotherapy <xxx*** Email address is removed for privacy ***xxcc
<*** Email address is removed for privacy ***>
Subject: GDPR CPD 15/06/18 11:00
Thread-Topic: GDPR CPD 15/06/18 11:00
Thread-Index: AdPtx977xJFncywCRfCg8uULSPeM5A==
Date: Thu, 17 May 2018 10:14:51 +0000
Message-ID: <*** Email address is removed for privacy ***>
Accept-Language: en-GB, en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
x-incomingtopheadermarker: OriginalChecksum:93568895EDD79744227D8FE8C8EA6974EC601C5D4CE18DB42D317175C93D4C1B;UpperCasedChecksum:D428D600C22BF915FEAA9849BC73C01E5878F6078A384C731A0F568152CB6DAC;SizeAsReceived:6807;Count:43
x-tmn: [aaDkjO+Hw0Z+fzHJ/bQwTDQuj8Ix5Epr]
x-ms-publictraffictype: Email
x-microsoft-exchange-diagnostics: 1;VI1EUR04HT241;7:gWECFSyhhPP9cysJkVKsWQySDifAtWClzybq9I0ukPVXO4jeFihyPFdF5FDd1KYqsa1Pgdf2y2EcFn3B4gdw0pflPoWFV+XJm/QQEsW7WDvSavjeORxJzDKFDW2po9hMN1LvXtm54z3EHEoIRXh4+MubHwcGR5ApcFlPkRQTUOCBTRZuQysE9XKEBmw3oZOUjt9U+HKLZ+Tiew1UpgY1GF0lp6QQU2xbENgmXHr3pCOo0ClHfEPydvmInQqqfvz2
x-incomingheadercount: 43
x-eopattributedmessage: 0
x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(201702061078)(5061506573)(5061507331)(1603103135)(2017031320274)(2017031324274)(2017031323274)(2017031322404)(1601125466)(1603101448)(1701031045);SRVR:VI1EUR04HT241;
x-ms-traffictypediagnostic: VI1EUR04HT241:
x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(444000031);SRVR:VI1EUR04HT241;BCL:0;PCL:0;RULEID:;SRVR:VI1EUR04HT241;
x-forefront-prvs: 067553F396
x-forefront-antispam-report: SFV:NSPM;SFS:(7070007)(377424004)(189003)(199004)(606006)(68736007)(104016004)(345774005)(733005)(81156014)(8936002)(6436002)(102836004)(99936001)(9686003)(861006)(790700001)(55016002)(5660300001)(8676002)(54556002)(6346003)(59450400001)(476003)(54896002)(26005)(5250100002)(6506007)(99286004)(6306002)(53546011)(33656002)(2900100001)(9326002)(86362001)(6916009)(325944009)(97736004)(486006)(82202002)(74482002)(25786009)(3660700001)(105586002)(106356001)(72206003)(14454004)(53386004)(7696005)(3280700002)(74316002)(1680700002)(236005)(578614002)(217873001)(15669805003);DIR:OUT;SFP:1901;SCL:1;SRVR:VI1EUR04HT241;H:DB6P193MB0085.EURP193.PROD.OUTLOOK.COM;FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:;
received-spf: None (protection.outlook.com: live.co.uk does not designate
 permitted sender hosts)
authentication-results: spf=none (sender IP is )
 *** Email address is removed for privacy ***;
x-microsoft-antispam-message-info: Dkif4VMCx/4cs/SuYvADVTp5T3R3Refx1mC5DZqXyGOBbFRrg+NL4Zttyho1zv2da8oZ10uDgRdHEzyCxdOSX6bzhtrKXx1mKSW+rLF+p/lfUGp8jnlsulKZlz/qOyzlTLnl0d8lD4cboeP2MenyfjZk/W3iQI/xLKj65QuRk8+0KnVditP9Qks92YHcP8Yd
Content-Type: multipart/related;
	boundary="_010_DB6P193MB0085C5961860DBBB5663CBF7BE910DB6P193MB0085EURP_";
	type="multipart/alternative"
MIME-Version: 1.0
X-MS-Office365-Filtering-Correlation-Id: 8fc3035e-c395-44a8-9d90-08d5bbdf076e
X-OriginatorOrg: outlook.com
X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 5dab7a8a-ebdc-4bd9-9cfd-67cde50b170b
X-MS-Exchange-CrossTenant-Network-Message-Id: 8fc3035e-c395-44a8-9d90-08d5bbdf076e
X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 5dab7a8a-ebdc-4bd9-9cfd-67cde50b170b
X-MS-Exchange-CrossTenant-originalarrivaltime: 17 May 2018 10:14:51.8802
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Internet
X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa
X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1EUR04HT241

Diagnostic information for administrators:

Generating server: HE1EUR04HT060.mail.protection.outlook.com
Receiving server: HE1EUR04HT060.eop-eur04.prod.protection.outlook.c

xxx @btinternet.com

5/20/2018 9:42:35 AM - Server at HE1EUR04HT060.eop-eur04.prod.protection.outlook.com returned '550 5.4.317 Message expired, cannot connect to remote server(521 rgin07.bt.int.cpcloud.co.ukService not available - no PTR record for 40.92.75.10)'
5/20/2018 9:33:29 AM - Server at btinternet.com(65.20.0.49) returned '450 4.4.317 Cannot connect to remote server [Message=521 rgin07.bt.int.cpcloud.co.uk Service not available - no PTR record for 40.92.75.10] [LastAttemptedServerName=btinternet.com] [LastAttemptedIP=65.20.0.49:25] [VI1EUR04FT024.eop-eur04.prod.protection.outlook.com](521 rgin07.bt.int.cpcloud.co.uk Service not available - no PTR record for 40.92.75.10)'

Original message headers:

Received: from VI1EUR04HT062.eop-eur04.prod.protection.outlook.com
 (10.152.29.29) by HE1EUR04HT060.eop-eur04.prod.protection.outlook.com
 (10.152.27.72) with Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.20.755.15; Fri, 18
 May 2018 23:08:47 +0000
Received: from HE1EUR04HT063.eop-eur04.prod.protection.outlook.com
 (10.152.27.75) by VI1EUR04HT062.eop-eur04.prod.protection.outlook.com
 (10.152.29.29) with Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.20.755.15; Fri, 18
 May 2018 21:36:29 +0000
Received: from HE1EUR04FT047.eop-eur04.prod.protection.outlook.com
 (10.152.26.60) by HE1EUR04HT063.eop-eur04.prod.protection.outlook.com
 (10.152.27.75) with Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.20.755.15; Fri, 18
 May 2018 09:23:02 +0000
Received: from DB6P193MB0085.EURP193.PROD.OUTLOOK.COM (10.152.26.55) by
 HE1EUR04FT047.mail.protection.outlook.com (10.152.26.143) with Microsoft SMTP
 Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id
 15.20.776.10 via Frontend Transport; Fri, 18 May 2018 09:23:02 +0000
Received: from DB6P193MB0085.EURP193.PROD.OUTLOOK.COM
 ([fe80::e855:5e69:47a5:93b9]) by DB6P193MB0085.EURP193.PROD.OUTLOOK.COM
 ([fe80::e855:5e69:47a5:93b9%13]) with mapi id 15.20.0776.010; Fri, 18 May
 2018 09:23:02 +0000
From: Tania Taylor Hypnotherapy <xxx@live.co.uk>
To: "Xxx@btinternet.com>
Subject: GDPR CPD 24/05/18 09:30am
Thread-Topic: GDPR CPD 24/05/18 09:30am
Thread-Index: AdPuibwrcKrsK8p8TbmVORAgvViI/g==
Date: Fri, 18 May 2018 09:23:02 +0000
Message-ID: <*** Email address is removed for privacy ***>
Accept-Language: en-GB, en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
x-incomingtopheadermarker: OriginalChecksum:E545E2935F3BE12EB6001BA5A0C1BAA8A282223D5106FEE7454345994AEE5C59;UpperCasedChecksum:B5B526CDB7B074FFA7C8391036B0926EA1A3281662684226AE31085EFE5B7D8F;SizeAsReceived:6816;Count:43
x-tmn: [PjAiIfw6MfbvD6v2Dl1R5wOrbcsD+aeQ]
x-ms-publictraffictype: Email
x-microsoft-exchange-diagnostics: 1;HE1EUR04HT063;7:UhgLx0vXWKdEaPqDDC2w/AyWuae+0fwkzU8wUg27y+i7IYAEcFHXO+/5YUqX9UuaXQ9hKxpxME17ieRaTZJygFCdG9BtqZRlyw5f9BkNb1hYcsDpL8frQQs4qqLR6huoMls7RGb6/KLIciwXVJSh7tvMFmFVXS7XftlzTZO4jzlSJriyO82pPB1h1IzasS8CRvq22I0fSfRV2L98L/I/MwmttTa+T72twW55ssxlpg9hMw3+bRuZktEAx46w4Wwv
x-incomingheadercount: 43
x-eopattributedmessage: 0
x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(201702061078)(5061506573)(5061507331)(1603103135)(2017031320274)(2017031324274)(2017031323274)(2017031322404)(1601125466)(1603101448)(1701031045);SRVR:HE1EUR04HT063;
X-MS-TrafficTypeDiagnostic: HE1EUR04HT063:|HE1EUR04HT063:|VI1EUR04HT062:|VI1EUR04HT062:|HE1EUR04HT060:
x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(444000031);SRVR:HE1EUR04HT063;BCL:0;PCL:0;RULEID:;SRVR:HE1EUR04HT063;
x-forefront-prvs: 0676F530A9
x-forefront-antispam-report: SFV:NSPM;SFS:(7070007)(377424004)(189003)(199004)(6306002)(74316002)(9686003)(106356001)(8676002)(606006)(476003)(86362001)(14454004)(9326002)(8936002)(105586002)(33656002)(3280700002)(54556002)(236005)(1730700003)(54896002)(3660700001)(861006)(81156014)(8666007)(486006)(74482002)(55016002)(6916009)(5660300001)(345774005)(7696005)(97736004)(99286004)(325944009)(72206003)(82202002)(6436002)(6506007)(26005)(6346003)(5640700003)(5250100002)(99936001)(25786009)(2501003)(790700001)(2900100001)(68736007)(2351001)(59450400001)(104016004)(733005)(102836004)(578614002)(217873001)(15669805003);DIR:OUT;SFP:1901;SCL:1;SRVR:HE1EUR04HT063;H:DB6P193MB0085.EURP193.PROD.OUTLOOK.COM;FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:;
received-spf: None (protection.outlook.com: live.co.uk does not designate
 permitted sender hosts)
authentication-results: spf=none (sender IP is )
 *** Email address is removed for privacy ***;
x-microsoft-antispam-message-info: /l2D5HT1agc25zUrzo11/oqv5WiEmo2qGSNVfQoH1hUs4agmGYkY1+8Fxa0n9HrmvboR6j46O9eKArupNdh7SimLZ/DeZVeRP2WDKQPw3fdTkkjbJdaW24fHphUOQKmwR68rIKtCZfh+GNziXU6djUgQQXmDA/onFHNCrBfLemc//8zFzxfdGuxFWOipArNO
Content-Type: multipart/related;
	boundary="_010_DB6P193MB008570A7EE30B7702EA88675BE900DB6P193MB0085EURP_";
	type="multipart/alternative"
MIME-Version: 1.0
X-MS-Office365-Filtering-Correlation-Id: 000d4e7b-0cd2-4b58-1c7e-08d5bca0f448
X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 5dab7a8a-ebdc-4bd9-9cfd-67cde50b170b
X-MS-Exchange-CrossTenant-Network-Message-Id: 000d4e7b-0cd2-4b58-1c7e-08d5bca0f448
X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 5dab7a8a-ebdc-4bd9-9cfd-67cde50b170b
X-MS-Exchange-CrossTenant-originalarrivaltime: 18 May 2018 09:23:02.1636
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Internet
X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa
X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1EUR04HT063
Return-Path: Xxx@live.co.uk
X-Microsoft-Exchange-Diagnostics: 1;VI1EUR04HT062;23:WhAwVVYH19Q372xeQ3GQNVi8gtkYmQ1ZlewWKx5nBv0ExUxR1es2PTGiFalQyJR4g7At49175FIbz3T1zGjKz6wS+Y+2S3aWzjHNwIUDljVSdk9CVaGQowwM/r9ECSDu+qVmnlxoT484AtIjuQuLog==
X-Microsoft-Exchange-Diagnostics: 1;HE1EUR04HT060;23:4Bzyd+tFlYx81oJ1+bLFmQWM8/KSOdw+AnBVv+kd+n/TJmTlUZn/d3GJHJy3ChknmbwpcmGHFJiKZMYp7KHuLPv3GZ35H23OXqCiGU0DqoFQYT+hyWEvc2IAuDLzCjW116sQyNgkDUsyM21uqyeoWg==
X-OriginatorOrg: outlook.com