Delivery Status Notification (Failure) - Message Blocked

I am receiving this message when trying to send messages to people with Outlook, Hotmail, or Live.com accounts. I am using my telus email accounts on the Apple Mail platform.

Please advise as to how to fix this problem.

The response from the remote server was:

550 5.7.515 Access denied, sending domain TELUS.NET doesn't meet the required authentication level. The sender's domain in the 5322.From address doesn't meet the authentication requirements defined for the sender. To learn how to fix this see: Spf= Pass , Dkim= Pass , DMARC= Fail [CH3PR08MB10242.namprd08.prod.outlook.com 2025-06-27T17:56:00.245Z 08DDB2BDEB385DDE] [DUZP191CA0062.EURP191.PROD.OUTLOOK.COM 2025-06-27T17:56:00.287Z 08DDB5195E09BD05] [DB1PEPF000509EE.eurprd03.prod.outlook.com 2025-06-27T17:56:00.290Z 08DDB1214C0B5922]