Sendmail 8.12.8

[Will Lane <will jxxtech net>]

Hello
   I have a RH9 box happily chugging away running sendmail 8.12.8 for 
the last 2 years.  It is setup under the legacy project yum and is up to 
date with the legacy project's patches.  So my question is, is this 
secure?  Even thought 8.12.8 is not the latest version of sendmail?  
Sorry for the question, i feel so naive...

Thanks
Will