Undeliverable: WARM REGARDS

[<postmaster@aber.ac.uk>]

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Your message to arastaff@aber.ac.uk couldn't be delivered.
When Office 365 tried to send your message, the receiving email server outside Office 365 reported an error.
mauve-patches   Office 365      arastaff
Sender          Action Required
Policy violation or system error

How to Fix It
Check the "Reported Error" from the "Error Details" section shown below for more information about the problem. The error might tell you what went wrong and how to fix it. For example, if the error states that the message was blocked due to a potential virus or because the message was too large, try sending the message again without attachments.
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________________________________

More Info for Email Admins
Status code: 550 5.0.350

The error reported by the receiving server wasn't specific enough to determine the exact nature of the problem. These errors often indicate the message violates a security or policy setting configured on the recipient's email servers.

If the sender is unable to fix the problem by modifying their message, then it's likely a problem that only the recipient's email admin can fix. Try the following:

Check the error for information about the problem - The "Reported Error" returned by the external email server can be found in the "Error Details" section below. This error might tell you what went wrong and provide clues for how to fix it. For example, if the error states the message was rejected due a Sender Policy Framework (SPF) issue, then you'll have to work with your domain registrar to correctly configure your domain's SPF records.

Check the error for information about where the problem is happening - For example, look for a domain name like contoso.com. A domain name in the error might suggest who is responsible for the error. It could be the recipient's email server, or it could be 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 - Give them the error code and error message from this non-delivery report (NDR) to help them troubleshoot the issue. For security or policy violation issues, it might be sufficient for them to just add your sending IP addresses or domain to their allowed senders list.

It's likely that only the recipient's email admin can fix the problem. Unfortunately, it's unlikely Office 365 Support will be able to help with these kinds of externally reported errors.

Original Message Details
Created Date:   11/29/2021 5:52:32 AM
Sender Address: mauve-patches@sourceware.org
Recipient Address:      arastaff@aber.ac.uk
Subject:        WARM REGARDS

Error Details
Reported error: 550 5.0.350 Remote server returned an error -> 550 You are not allowed to submit to that recipient
DSN generated by:       CWLP265MB5850.GBRP265.PROD.OUTLOOK.COM

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Content-Type: multipart/alternative; boundary="===============1314465992=="
MIME-Version: 1.0
Subject: WARM REGARDS
To: Recipients <mauve-patches@sourceware.org>
From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Date: Mon, 29 Nov 2021 13:52:32 +0800
Reply-To: bjattorneys5@gmail.com
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
To: Recipients <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 13:52:32 +0800
Message-ID: <2f17974a-07a5-4dc4-b30b-2b7bd424aad2@AM5EUR02FT012.eop-EUR02.prod.protection.outlook.com>

[RHYBUDD! E-BOST ALLANOL / CAUTION! EXTERNAL E-MAIL]


Good Day,

An exhaustive and meticulous search was conducted and it is in connection with this search that I'm writing to you today base on your surname which you share with a client that is now deceased. Revert back to me for more details to be given to you.

Sincerely,
Barr Ben Johnson