postfix config

[Bill Holt]

Does anybody know the correct syntax for adding multiple address for the same domain in the /etc/postfix/transport file?

This entry is used to direct postfix to whom to relay mail to...

example (does not work but you get the idea of what I'm tring to do...):
I have a mail gateway (redhat/postfix) and 2 exchange servers. I would like to be able to relay the mail to both as I plan to decomission the old one at some point.

example.com smtp:1.1.1.1
example.com smtp:1.1.1.2

thank you for any help.