Emails to a particular email address get bounced back as undeliverable. Error message is as follows:
The following message to <firstname.lastname@example.org> was undeliverable.
The reason for the problem:
- 5.1.0 - Unknown address error 554-'5.7.1 188.8.131.52: on real-time blacklist stj9d4lx6jgzlaudhr3k7ku29v2vecg.r.mail-abuse.com'
According to the recipient, the IP address is on several real-time blacklists:
I have tried using Shaw webmail and get a very similar message except the IP address is slightly different.
I have never sent spam. How do we get the IP address off the blacklists?