sendmail config question

I configured Solaris 10 server to send all mails to our exchange server via D{MTAHost}[ip-address] in submit.cf. but now I don't get internal messages like cron output.
what can I do?

Give the other users email accounts up there? No, google submit.cf !

Re: submit.cf and local delivery

Thanks, but no help yet. All unix users have an email account by default. specifically, oracle user used to get internal emails from cron until I set MTAHost in config.cf. I followed your link: I have the line "DS" in sendmail.cf, and also added the hostname in local-host-names file. still no help. anything further (other than reading tons of stuff in google submit.cf) ?
Thanks