Unable to send emails to outlook

Occasional Visitor



I would like to seek help with email delivery to outlook. it's been 2 months now since we encountered the issue - unable to send to outlook. We are receiving NDR from outlook.

Moreover, we have our own mail exchange server.


Below is the Delivery Message

Delivery has failed to these recipients or groups:

Email address removed
Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept email from certain senders, or another restriction may be preventing delivery.

Diagnostic information for administrators:

Generating server: mailgateway.edataservices.com

Email address removed
Remote Server returned '554 5.7.1 < #5.7.1 SMTP; 550 5.7.1 Unfortunately, messages from [] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [BN1NAM02FT014.eop-nam02.prod.protection.outlook.com]>'

Original message headers:

Return-Path: <Email address removed>Received: from mail.edataservices.com (exh05.itsrvr01.com [])        by mailgateway.edataservices.com  with ESMTP id 20P0XTfr028317-20P0XTft028317        (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=CAFAIL)        for <Email address removed>; Tue, 25 Jan 2022 08:33:29 +0800Received: from EXH06.itsrvr01.com ( by EXH05.itsrvr01.com ( with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.858.15; Tue, 25 Jan 2022 08:33:29 +0800Received: from EXH06.itsrvr01.com ([fe80::3128:a202:d762:dc45]) by EXH06.itsrvr01.com ([fe80::3128:a202:d762:dc45%8]) with mapi id 15.02.0858.015; Tue, 25 Jan 2022 08:33:29 +0800From: "Ester G. Policarpio" <Email address removed>To: "Email address removed" <Email address removed>Subject: test 01252022Thread-Topic: test 01252022Thread-Index: AdgRgynvN9wSHFVlQS6cZSt+1rHLsA==Date: Tue, 25 Jan 2022 00:33:28 +0000Message-ID: <Email address removed>Accept-Language: en-AS, en-USContent-Language: en-USX-MS-Has-Attach:X-MS-TNEF-Correlator:x-originating-ip: []Content-Type: multipart/alternative;        boundary="_000_08a031f9ccc14415898a02214fc57bd6edataservicescom_"MIME-Version: 1.0


We hope that you could help us with our concern.

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