Groups.io emails to Talktalk continually bouncing

[sixandup]

I am getting messages from groups.io to unbounce my emails with the following error messages:-

mx.talktalk.net: 452 4.2.0 ExC9sSo2Nb2irExC9sIWqw Content deferred (TT991)

mx.talktalk.net: 550 5.1.1 EsOisGZG99sqL Recipient Undeliverable (TT512)

Would you be kind enough to advise me how I can stop this happening and what is causing it as it is becoming an issue because I do not respond to questionnes.

Many thanks

[Ady-TalkTalk]

Hi VC10FAN, this is an old thread. Please start your own topic so that we can help you with current processes.

Ady

[VC10FAN]

I too am getting the same problem. Three times this week I have been advised that my groups.io accounts are bouncing and I have had to reset. Please address this urgently. 

[Ady-TalkTalk]

Hi sixandup, I've raised an incident for this issue and its being investigated at present. 

Ady