It appears as the admin of the Osirusoft database has gone insane and has blacklisted the world. This means if you are running a spamfilter using this database, you could end up blocking ALL company email. The article below explains the problem..
The fix in spamassassin is to add the following to the local.cf file.
score X_OSIRU_OPEN_RELAY 0
score RCVD_IN_OSIRUSOFT_COM 0
score X_OSIRU_DUL 0
score X_OSIRU_SPAM_SRC 0
score X_OSIRU_SPAMWARE_SITE 0
score X_OSIRU_DUL_FH 0
That removes the Osirusoft tests from the scoring process.
http://slashdot.org/articles/03/08/2...id=111&tid=126 
WARNING to all those using Osirusoft blacklist.
