Update DNS and sendmail in ES2.1

[Guangcheng Wen]

Hello Gurus,

I am going to install RH ES2.1 with bind 9.2.1 and sendmail 8.11.6,
and then update bind to 9.2.4-EL3_10 and sendmail to 8.12.11-3_3 from 
the packeges in
http://ftp.redhat.com/pub/redhat/linux/updates/enterprise/3ES/en/os/SRPMS/

I am not sure whether bind9.2.4-EL3_10 and sendmail8.12.11-3_3 work on RH ES2.1.
Comments or information concerning this or pointers to some documentation would 
be appreciated.

Cheers,

--Wen