Yes, start up sendmail or postfix to listen on a port. :-)
Presumably, you mean sending by calling the mail binary (which
could /usr/bin/sendmail or /usr/bin/postfix or whatever). In that acse,
there isn't a way to do that out of the box.
For your own mail, using the EmailMessage, you could write a different
connection class and use that (instead of SMTPConnection), but for the
mail sent by the admin, etc, using send_mail() and send_mass_mail(),
you're stuck with what's there for now.
Still, this wouldn't be a bad improvement to make after 1.0.
Regards,
Malcolm