Even better solution is to configure /etc/aliases to direct root's mail to your e-mail address. Then you can use whatever e-mail program you like.
Just be sure to have some kind of queue-runner process in place to forward e-mail to your mail server.
We haven't had mail sit on a server for several years now. It's a lot easier to check one mailbox than to ssh to a bunch of different servers and read mail on them.