CentOS Errata and Security Advisory CESA-2011:0307
mailman security update for CentOS 4 x86_64: https://rhn.redhat.com/errata/RHSA-2011-0307.html
The following updated file has been uploaded and is currently syncing to the mirrors:
x86_64: mailman-2.1.5.1-34.rhel4.7.x86_64.rpm
src: mailman-2.1.5.1-34.rhel4.7.src.rpm