Help configuring sendmail to send only using authorization to smart host

[Phusion]

I need some help configuring sendmail to send only using authorization
to a smart host being the ISP's mail server. I'm running 7.2-RELEASE.
I've looked over
http://www.freebsd.org/doc/en/books/handbook/outgoing-only.html but
want to use the built-in sendmail. I've run the following command:
sendmail -d0.1 -bv, but SASL isn't included. Also, I would rather uses
packages. Please advise.

Phusion