kornet have a spam problem. I'm getting a lot of spam from their IP addresses, and it seems that they aren't anywhere near in control, as the same IP addresses keep sending me spam. I report spam to them, and nothing happens. Well, until today:
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
SMTP error from remote mailer after MAIL FROM: SIZE=4145:
host mx.kornet.net [22.214.171.124]: 550 5.1.8 you are not allowed to send mail.
"La la la - I can't hear you"