Binary packages in this directory are built as follows:

RedHat Linux Enterprise Server 2.1 (rhes21)
- Aaron P. Martinez <aaron@proficuous.com>

Newer packages will be labelled rhel21.

If you are looking for a newer binary rpm than the one shown here please
check Aaron's site[1] or consider building one yourself from the src.rpm
in the SRPMS directory where a newer version may be available.

[1] http://www.proficuous.com/postfix/RHEL2.1/postfix_2.1
Note: he also provides other binary RPMs with different options enabled.