If you are using relays.osirusoft.com as one of your MAPS servers in Spam Filter, you need to remove it now, as this Blacklist Server is now blacklisting all sites (IP: *.*.*.*). This means all queries to this server will return as a Blacklisted Site, and depending upon your Spam Filter configuration, either disconnect or quarentine the email.  relays.osirusoft.com has shutdown, and as a way of getting point across the author has blacklisted all sites WORLDWIDE. For more infomation, see the article below.

http://slashdot.org/article.pl?sid=03/08/27/0214238&mode=thread&tid=111&tid=126

- Sean