Undelivered Mail Returned to Sender

#Nick — Mon, 08 Jun 2026 00:30:39 GMT

Hello TalkTalk community

Having sent 2 emails to @bigpond.com & bigpond.net.au, I have received the following message:

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

Sender domain rejected. IB302 550

5.7.1 i{5e5a7653-130b-49ed-ad08-9c5627d3e1a1} (in reply to MAIL FROM

command)

How can I get this sorted?

Many thanks

Re: Undelivered Mail Returned to Sender

KeithFrench — Wed, 10 Jun 2026 08:56:47 GMT

Hi @#Nick

This will require TalkTalk to deal with your problem. There are no TalkTalk support staff on this forum anymore.

Please see my signature for TalkTalk contact methods.

topic Undelivered Mail Returned to Sender in Email

Undelivered Mail Returned to Sender

Re: Undelivered Mail Returned to Sender