CentOS Errata and Security Advisory 2006:0129
https://rhn.redhat.com/errata/RHSA-2006-0129.html
The following updated files have been uploaded and are currently syncing to the mirrors:
i386: spamassassin-3.0.5-3.el4.x86_64.rpm
src: spamassassin-3.0.5-3.el4.src.rpm