topic Re: Very odd 'failure to send' message in Email

Very odd 'failure to send' message

Stiggywig — Fri, 20 Mar 2026 12:56:44 GMT

Using Thunderbird I sent a message I am (aaaaaaa) to half a dozen people that brought the response

"Sending of the message failed.

An error occurred while sending mail. The mail server responded:

<aaaaaaa@talktalk.net>: Sender address rejected: not owned by user 3@10111010.

Please check the message recipient "bbbbbbb@dsl.pipex.com" and try again."

I then tried further recipients individually all frequently mailed and got the same response.

The error message makes no sense to me whatsoever - anyone seen this before?

Re: Very odd 'failure to send' message

fr8ys — Fri, 20 Mar 2026 13:05:56 GMT

Can you try using recommended settings for TalkTalk emails and derivatives such as yours please

https://help-centre.talktalk.co.uk/Email/Set_up_TalkTalk_email/Email_settings_to_access_TalkTalk_emails

Can you send via Webmail?

Re: Very odd 'failure to send' message

Philile-TT — Fri, 20 Mar 2026 13:12:50 GMT

@fr8ys thank you for the support.

Re: Very odd 'failure to send' message

Stiggywig — Fri, 20 Mar 2026 22:04:50 GMT

Steve - thanks, I tried webmail from my phone - same result, so not Thunderbird. I should have thought of that test

Re: Very odd 'failure to send' message

fr8ys — Fri, 20 Mar 2026 22:29:32 GMT

Ok, as you can't send via Webmail, you will either have to phone or chat, or wait for the support team to return Monday.

Re: Very odd 'failure to send' message

Philile-TT — Mon, 23 Mar 2026 07:10:21 GMT

@Stiggywig please advise if you still require assistance

Re: Very odd 'failure to send' message

Stiggywig — Mon, 23 Mar 2026 11:21:13 GMT

No action required - checked and service looks to be resumed to normal - Thanks

Re: Very odd 'failure to send' message

Philile-TT — Mon, 23 Mar 2026 11:30:57 GMT

@Stiggywig that is great, thank you for the update.

Re: Very odd 'failure to send' message

Stiggywig — Wed, 25 Mar 2026 18:28:01 GMT

Sadly the problem has returned only this time I can send Mails and my wife can't. ???

Re: Very odd 'failure to send' message

Thabile-TT — Thu, 26 Mar 2026 07:16:21 GMT

Hi there @Stiggywig I'm sorry about the email issue you are experiencing I will need to look into your account to further assist you.

Re: Very odd 'failure to send' message

Stiggywig — Thu, 26 Mar 2026 10:39:41 GMT

Hi Thabile - quick update, my wife unable to send from TBird but can via webmail on phone, I can use both.

Re: Very odd 'failure to send' message

nambuso-TT — Thu, 26 Mar 2026 11:04:31 GMT

Can you try to remove the account from thunderbird and add it again. This can sometimes resolve the issue.

Re: Very odd 'failure to send' message

Stiggywig — Thu, 26 Mar 2026 15:09:26 GMT

It's been a long time sinc I've played with Thunderbird settings and the like - bear with me. Originally I set up my account and then added my wife as one of the 5 or 6 addresses available. Are you suggesting removing just the problematic wife's details?

Re: Very odd 'failure to send' message

nambuso-TT — Thu, 26 Mar 2026 15:14:09 GMT

No, please remove the email account from thunderbird and add it again.