I emailed with

<bosshossharris@hotmail.com

and after initial success, received a very long rejection message which included

----- Forwarded Message -----
From: "postmaster@outlook.com" postmaster@outlook.com
To: "bosshossharris+SRS=AAL6X=GA=compuserve.com=asbeesley@hotmail.com" <bosshossharris+SRS=AAL6X=GA=compuserve.com=asbeesley@hotmail.com>
Sent: Friday, 7 August 2026 at 10:40:39 BST
Subject: Undeliverable: Re: Hello Steve

mx10-prd-nl1-vmo.edge.unified.services rejected your message to the following email addresses:

bosshossharris1@virginmedia.com

Your message couldn't be delivered because the recipient's email system wasn't able to confirm that your message came from a trusted location.

For Email Administrators
This error is related to the Sender Policy Framework (SPF). The destination email system's evaluation of the SPF record for the message resulted in an error. Please work with your domain registrar to ensure your SPF records are correctly configured.


mx10-prd-nl1-vmo.edge.unified.services gave this error:
The message was rejected because of Sender Policy Framework violation -> 554 MXIN603; DMARC validation failed.; ;id=sH4AwwSDqEIEFsH4AwrozG;sid=sH4AwwSDqEIEF;mta=mx10-prd-nl1-vmo;dt=2026-08-07T11:40:39+02:00;ipsrc=52.103.39.33;




Diagnostic information for administrators:

Generating server: PAXP195MB1373.EURP195.PROD.OUTLOOK.COM

bosshossharris1@virginmedia.com
mx10-prd-nl1-vmo.edge.unified.services
Remote server returned '550 5.7.23 The message was rejected because of Sender Policy Framework violation -> 554 MXIN603; DMARC validation failed.; ;id=sH4AwwSDqEIEFsH4AwrozG;sid=sH4AwwSDqEIEF;mta=mx10-prd-nl1-vmo;dt=2026-08-07T11:40:39+02:00;ipsrc=52.103.39.33

ADDITIONAL DATA CAN BE PROVIDED ON REQUEST

RECENT CORRESPONDENCE WITH ANOTHER HOTMAIL ACCOUNT HOLDER HAD THE SAME PATTERN, INITIAL CONTACT, THEN REJECTION.

ASBeesley@compuserve.com