CentALT has released Postfix 2.8.5 packages (incl. VDA) for CentOS 5



You can download the packages here or over the CentALT Repository:

For i386:

rpm -ihv http://centos.alt.ru/repository/centos/5/i386/centalt-release-5-3.noarch.rpm

For x86_64:

rpm -ihv http://centos.alt.ru/repository/centos/5/x86_64/centalt-release-5-3.noarch.rpm