CentOS Errata and Security Advisory 2006:0264
https://rhn.redhat.com/errata/RHSA-2006-0264.html
The following updated files have been uploaded and are currently syncing to the mirrors:
i386: sendmail-8.13.1-3.RHEL4.3.i386.rpm sendmail-cf-8.13.1-3.RHEL4.3.i386.rpm sendmail-devel-8.13.1-3.RHEL4.3.i386.rpm sendmail-doc-8.13.1-3.RHEL4.3.i386.rpm
src: sendmail-8.13.1-3.RHEL4.3.src.rpm