Failure to receive emails, circa 17:00-05:00, 12/12/24-13/12/24

[TrevorAtNo16]

My TalkTalk email failure to receive emails from many sources, circa 17:00-05:00, 12/12/24-13/12/24, which prevented some 2 stage verifications as did not receive the verification codes. This included the login to this community and the Dell login,

https://www.dell.com/di/idp/dwa/authorize?response_type=id_token&client_id=657d850a-459b-4b56-ab6d-3...

• Receiving Mail

dci%2ffp%2fdi%2fv3%2ffp%2fsession%2fauthorize%3fclient_id%3daaee5270-1b7b-4bad-b5c7-05216cfff146%26c%3duk%26l%3den%26redirect_uri%3dhttps%253a%252f%252fwww.dell.com%252fen-uk%26ContextId%3d2ad903b4038641fe82ec28ad6cc230ca&tag=cid=aaee5270-1b7b-4bad-b5c7-05216cfff146&state=fp&scope=openid&code_challenge=E9Melhoa2OwvFrEMTJguCHaoeK1t8URWbuGJSstw-cM&code_challenge_method=S256&nonce=069e9249-20f8-4d5e-82c2-098fcfad9cd2&contextid=2ad903b4038641fe82ec28ad6cc230ca&c=uk&l=en

I sent some test emails to my TalkTalk mailbox (from Plusnet, gmail, etc) which were not received. I received no messages to indicate that the emails had been blocked but initiated the "Delivery Status Notification" in Thunderbird and got the following and similar responses:

- These recipients of your message have been processed by the mail server:
xxxxxxxx@homecall.co.uk; Failed; 5.3.0 (other or undefined mail system status)
Remote MTA mx003.tt.xion.oxcs.net: network error
- SMTP protocol diagnostic: 550 5.7.1 Message rejected per sender's SPF policy - OXSEU001_514 - https://postmaster-oxseu.vadesecure.com/inbound_error_codes/

• Receiving Mail

Shortly after 05:00 I tried the Dell login again, which failed at my first attempt, but was then successful.  The mailbox appears to be working now but I fear that some emails may continue to be blocked and that a recurrence of the issue may occur.

Please raise a ticket on this issue

[Ady-TalkTalk]

I won't be able to give either Trevor I'm afraid. 

Ady

[TrevorAtNo16]

Hi Ady,
Thanks for the help.

Indeed, but I still need confirmation that the issue has been resolved and notification of any emails sent to me, that have been lost so that I can ask the sender(s) to resend,

Trevor

[Ady-TalkTalk]

Hopefully, that means you'll have no further problems. 

Ady

[TrevorAtNo16]

Hi Ady,
Thanks for the reply.
I have detected no further issues since that last one on the Dell login at 05:00 on 13/12/24. 

The consequence is that I do not know if there were any emails sent to me, that have been lost, without the sender being aware of the problem.  The same would apply to others if they were affected without detecting the problem.  The only reason I knew that there was a problem was that I did not receive the second stage verification codes that I was expecting,

Trevor

[Ady-TalkTalk]

Hi TrevorAtNo16, are you continuing to have problems? 

Ady