In the Undelivered Mail, if you look through it, you should see something like this:-
Client host [x.x.x.x] blocked using Spamhaus. To
request removal from this list see
https://www.spamhaus.org/query/ip/x.x.x.x
Click on that link & it should remove the block.
The TalkTalk Community has now moved to a peer-to-peer support model. This means that the TalkTalk team will no longer be here to support with queries. Don’t worry, there are plenty of ways to reach out if you need to speak to TalkTalk directly. For more details check out the link here
How to contact TalkTalk Broadband - TalkTalk Help & Support
