Thanks to everyone for the help with my request. What I have decided
on (at least for the time being) is to install Postfix on the guests I'm
interested in and run it instead of sendmail. I can get that done with a
series of short, easy-to-document steps, whereas sendmail wasn't cooperating
with me.
I may go back later and check into running Postfix on demand rather
than as a daemon; that all depends on what else I need to do with it.Thanks again, Jon
