So I just received a message from mxtoolbox that my server has been listed by the BSB Domain blacklist...
mxtoolbox.com
"The BSB is a database of IP addresses that have sent "comment spam". "
The BSB website is no longer active, so I can't check for details there:
Since this is about comment spam, the mail logs are not helpful.
Any idea how to detect the culprit...?

RHSBL - BSB Domain
The BSB website is no longer active, so I can't check for details there:
Since this is about comment spam, the mail logs are not helpful.
Any idea how to detect the culprit...?