You are blocked sending email

[john1236]

Receving the following error message when sending emails.  Have tried and failed to have the email account unblocked via chat and customer services telephone line.

Message could not be sent to the following recipients: ["???????????@hotmail.com" <?????????@hotmail.com>] (554 - 554 5.7.1 <?????.??????@talktalk.net>: Sender address rejected: You are blocked sending mail).

Thanks in advance.

[siphosethu-TT]

Hi there @john123, please note that this case was assigned to another team and they were suppose to contact you. I'll just check on the account and see if any notes were left okay. Thanks

[john1236]

Hello - please could you provide an update as indicated in your last message?

[nambuso-TT]

Thank you for the information:)

We will now pass this to a case manager who will complete further diagnostics to fix your email issue and we will contact you on your preferred number in the next 3 working days (not including Saturday and Sunday).

[nambuso-TT]

Noted.

Do you have a mobile number you can provide us so we can contact you if needed? Please provide this privately:) Thanks

[john1236]

Hello - as detailed in an earlier post my email account was hacked sometime in April / May 2025.  I spoke with TT support and the email account was locked down.  I've been trying to have my email account unblocked for some time now.  Just this week a 'fraud flag' was removed but this issue still continues. 

[nambuso-TT]

I just need a few more details from you so I can escalate the issue. Can you provide the following please?

Can you provide the date and time when this issue first occurred?

[john1236]

I cannot see the test email in my inbox as the test email did not send.  The same error message was received.  Copied below.

Message could not be sent to the following recipients: ["test-mail@talktalk.net" <test-mail@talktalk.net>] (554 - 554 5.7.1 <a????.h????@talktalk.net>: Sender address rejected: You are blocked sending mail
)

[nambuso-TT]

After logging back in please confirm if you can see the email.

[nambuso-TT]

Alright so please log out of your TalkTalk Mail account and then log back in again.

[john1236]

I can see the inbox but have not received the test email.  I am unable to send any emails from this email account.

[nambuso-TT]

Okay, could you please go back to the main Inbox page. Can you now see the email?

[john1236]

OK, I've cleared the cache and tried sending another email to test-mail@talktalk.net.  Still the same error message appears

[nambuso-TT]

Alright, thank you for doing so, We'll need you to clear your browser cache. To do this, please follow these steps:

Click the three dots on the top right corner of the browser and select Settings . Click the button labeled 'Choose what to clear'.Check the boxes for each item you want to clear. Click the Clear button. The message "All Clear!" will appear at the top when the data has been erased.

[john1236]

Have just tried MS Edge and receive the same error message.

[nambuso-TT]

Okay thank you very much for confirming. Do you have an alternative browser to check and see if there would be any issues?

[john1236]

The following error message is received.

Message could not be sent to the following recipients: ["test-mail@talktalk.net" <test-mail@talktalk.net>] (554 - 554 5.7.1 <a????.h????@talktalk.net>: Sender address rejected: You are blocked sending mail
)

[nambuso-TT]

Please send an email to the following email address test-mail@talktalk.net.

[john1236]

OK, I have tried this so what would you like me to do exactly?

[nambuso-TT]

Alright, The next step is to check your mailbox's send and receive functionality, so you'll now need to send a test email.

[john1236]

Email quota is 841MB of 10GB.  So no, it's no where near full.