[Centos] Postfix with TLS

Fri Jan 14 23:05:37 UTC 2005
support at ev-theol.uni-bonn.de <support at ev-theol.uni-bonn.de>

hi all,
i tried to install postgrey for postfix and had to update postfix to version
i added the following to /etc/yum.conf
name=Postfix Mail Server for RedHat Enterprise Linux 3.0 - $basearch

after the update i have problems because the new version of postfix doesn´t
support SASL.
is there an postfix-tls rpm for CentOS 3? If not how can i remove postfix 2.1
and install the old version with TLS support?
thank you very much for your help