And please do not ask your ops group to support more than 2 db's.
It is strategically imperative to add a free db to the mix if only to give you some leverage over the non-free vendors. Otherwise Oracle will bleed you. So OK they're going to bleed you anyway but maybe not so badly.
Sendmail may be safely run set-user-id to root. -- Eric Allman, "Sendmail Installation Guide"