Bump for an old thread, but a new problem. Mail from this site to yahoo addresses just started bouncing today. The error message in the bounce says that the IP address is listed in the
spamhaus blocklist, yet when I check the IP on that site, it says that neither the IP nor the domain are on the list.
Not sure if it's a temporary glitch or a more widespread problem. If all mail from this IP can't deliver to hotmail or yahoo, I've got to move the site at some point in the near future.