Email bounced back

Pash02 — Wed, 16 Jul 2025 10:05:49 GMT

My email has bounce back when i tried to send it and i don't understand why.

It was sent from my e mail client along with another 10 to different email address which are successful.

This is the message i got back but with emails edited

This is the mail system at host man03.zed1.io.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

The mail system

outlook-com.olc.protection.outlook.com[52.101.68.2] said: 550 5.7.509

Access denied, sending domain [TALKTALK.NET] does not pass DMARC

verification and has a DMARC policy of reject.

[DB9P250MB0570.EURP250.PROD.OUTLOOK.COM 2025-07-16T09:53:04.165Z

08DDC28648740AD2] [DUZPR01CA0067.eurprd01.prod.exchangelabs.com

2025-07-16T09:53:30.072Z 08DDC40378BA0FCB]

[DU2PEPF0001E9C5.eurprd03.prod.outlook.com 2025-07-16T09:53:04.173Z

08DDC42C2B027B13] (in reply to end of DATA command)

Also this message but for the same as one of the e mail address as above .

This is the mail system at host mx-out.tt.xion.oxcs.net.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

The mail system

<xxxxx@outlook.com>: host outlook-com.olc.protection.outlook.com[52.101.68.2]

said: 550 5.7.515 Access denied, sending domain TALKTALK.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:

DMARC= Pass [AS8P250MB0964.EURP250.PROD.OUTLOOK.COM

2025-07-16T09:53:02.582Z 08DDC1FF5C9D4190]

[DUZPR01CA0316.eurprd01.prod.exchangelabs.com 2025-07-16T09:53:10.348Z

08DDC3ED346F147C] [DU2PEPF0001E9C1.eurprd03.prod.outlook.com

2025-07-16T09:53:02.590Z 08DDC2E3E18FEAA4] (in reply to end of DATA

command)

What going on?

Thanks

Re: Email bounced back

siphosethu-TT — Wed, 16 Jul 2025 13:15:15 GMT

Hi there @Pash02, please contact the full fibre team and they will take you through checks. You can use the chat link or the number below.

03451720074

Opening Hours:

VOICE - Mon-Fri: 9am-7pm; Sat: 9am-6pm; Sun: closed