Rejected emails TT992

[plodder]

I am having the same problem with rejected messages and code TT992. Sample below:

cm8nec rejected your message to the following email addresses:

[TalkTalk email address 1]
There's a problem with the recipient's mailbox. Please try resending the message. If the problem continues, please contact your email admin.

cm8nec gave this error:
zK11rNFC829TDzK11riyzm Content rejected (TT992)

[TalkTalk email address 2]
There's a problem with the recipient's mailbox. Please try resending the message. If the problem continues, please contact your email admin.

cm8nec gave this error:
zK11rNFC829TDzK11riyzm Content rejected (TT992)

Emails from one TalkTalk ID to another TalkTalk ID are fine.

We are getting this problem with two business accounts (solicitor and surveyor) but other emails are getting through with no problem. And until recently (around April 19th) both business accounts were sending successfully. Do you have a solution for this?

[Ady-TalkTalk]

Thanks Simon, I've added those to the incident. 

Ady

[Simonch]

Hi Ady

They're both companies:

Solicitors    @leitchco.uk

Estate agents    @haymanjoycebroadway.co.uk

Reards

Simon    

[Ady-TalkTalk]

Hi Simon, please provide the email domain for the senders just the bit after the @ symbol please. 

Ady

[Simonch]

I'm having the same problem which started at the weekend and is affecting my lineone account. My solicitor and estate agent are both reporting emails are rejected with the message - there is a problem with the recipients mail box. I have been receiving emails ok last week. As you might imagine these are important emails as I'm currently going through a house purchase.

Regards

Simon Chandler