Done (thanks to this thread).
#sudo nano /etc/mail/sendmail.cf
search for DS
# “Smart” relay host (may be null)
DSfoo.domain.bar [Note! There is no space between DS and the domain.)
#sudo /etc/init.d/sendmail restart
Now I can spend my time playing with Joomla!
Why not drupal?
Ha! You know my track record with Drupal, something like 0-3!
What we like about Joomla is the polish and that it is designed with the non-technical contributers in mind. Drupal’s flexibility meant more work for us in getting it built and deployed and then even more hand holding to get the contributers comfortable. Me = Lazy
That said, we’ll see if my track record with Joomla matches the one with Drupal.