[CentOS] Mail[x] / Sendmail - CentOS 3

I'm upgrading some servers from rh7.3 -> CentOS 3 and have several scripts that use "mail" to relay messages to my mail server.

Am I correct on the assumption that you now have to have sendmail running to use mail, where as previously you did not? Or am I missing something?

It's been driving me crazy for couple days trying to figure out why "mail" works on 7.3 without sendmail running and will only work with sendmail running on CentOS 3.

I'm guessing as part of a "secure install" you now need to use "client queue ruuner" part of sendmail?

Sure liked the old way, anyway to revert?

Just don't like to run an additional process for just a couple of emails a day, or I guess I could use a cron job to process emails.