Spanhaus

[RobinCowen]

How do I clear being blocked by Spamhaus when my IP address is clean?

[KeithFrench]

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. 

[sabelo-TT]

Hello there @RobinCowen, have you tried completing the Spamhaus Blacklist Removal Form?