postfix with tls support newbie question

["Steven J Lamb" <redhattedsheep adiis net>]

I have an up and running a fedora core 4, postfix, amavis-new, spamassassin, 
dbmail server up and running and I am trying to figure out how to get my tls 
certs working. however my error file tells me that tls was not compiled into 
postfix is there a version of postfix with tls installed in it in yum 
somewhere. or is there an easy way to compile it without interrupting my 
current settings.

thanks

Steven Lamb