Emails from one particular domain not arriving

[YorkshireGirl]

Emails to me from one particular domain address should come into my mailbox several times but for the past few weeks, I have not received any emails at all. They show as having been bounced back by TalkTalk.

How do I add this domain name to my Talktalk email account so that all emails from this sender are accepted and do not bounce back.

I have tried everywhere to find how to do this on my account or by Googling it but have had no joy.

[Gondola]

Excellent news.

I appreciate your time to let me know. Thank you.

[YorkshireGirl]

Thanks for your help and it appears that once I asked for a TT code at the other end, they found the problem was theirs, and it is  now fixed. Thanks anyway.

[Gondola]

Hi YorkshireGirl 

There is no option to whitelist or trust a specific mail domain.  What is the domain that's getting the bounceback error and what is the full bounceback message including the TT error code that will help us to identify the reason for the bounce.