sending domain [BTINTERNET.COM] does not pass DMARC verification

[hilaryHale2026]

When I send an email to an outlook.com email address the email gets through without problem, however

when I send an email to an address that forwards it on to several email addresses, I get the following error for any hotmail or outlook email addresses that are being forwarded to.

SJ1PEPF00002312.mail.protection.outlook.com rejected your message to the following email addresses:

[email protected]

Your message wasn't delivered. Please try resending the message.

SJ1PEPF00002312.mail.protection.outlook.com gave this error:

Access denied, sending domain [BTINTERNET.COM] does not pass DMARC verification and has a DMARC policy of reject. [PRAP195MB1579.EURP195.PROD.OUTLOOK.COM 2026-06-30T09:41:35.093Z 08DED54C4AAB84B9] [BY5PR03CA0030.namprd03.prod.outlook.com 2026-06-30T09:41:35.168Z 08DED38D56154ABB] [SJ1PEPF00002312.namprd03.prod.outlook.com 2026-06-30T09:41:35.170Z 08DED20F3C5AEE41

[licquorice]

If the mail is being auto-forwarded from another address, it won't be the BT SMTP server sending it. It will be the server associated with the domain forwarding the mail.

[hilaryHale2026]

I'm not sure why the error message would say that btinternet.com does not pass DMARC verification

[licquorice]

Probably because whatever is generating the message is looking at the email address rather than the sending domain.