Received the following error when sending an email from a btinternet account to a hotmail account.
This is the mail system at host mtl-mta03-out2.
I'm sorry to have to inform you that your message could not be delivered to
one or more recipients. It's attached below.
<xxxxxxxxx@hotmail.com> failed: host
hotmail-com.olc.protection.outlook.com
(52.101.8.53) said: 550 5.7.509 Access denied, sending domain
[BTINTERNET.COM] does not pass DMARC verification and has a DMARC policy of
reject.
[MI0P293MB0169.ITAP293.PROD.OUTLOOK.COM 2025-11-11T15:20:04.583Z
08DE1FAC19F6BCB2] [DS7PR06CA0033.namprd06.prod.outlook.com
2025-11-11T15:20:04.626Z 08DE212A883F578C]
[DS3PEPF0000C37D.namprd04.prod.outlook.com 2025-11-11T15:20:04.641Z
08DE1EE179FE3A30]
Reporting-MTA: dns; mtl-mta03-out2
Received-from-MTA: dns; [10.0.16.220] (10.138.12.10)
Arrival-Date: Tue, 11 Nov 2025 15:20:01 +0000
X-Original-ID: f85d0f40-d7c8-4b8e-bb9c-2ffa965967f9
Any thoughts on how this can be resolved? Is it a BT email config issue?
