We could just use the custom mail class we have and stick the admins in the To list. mail_admins() basically does that anyway, but with the built-in class. That way, we get HTML on 1.2 and 1.3.
Fix new-user notification on django < 1.3
Review Request #2404 — Created June 19, 2011 and submitted
Fix new-user notification on django < 1.3 The new-user notification email sent both text and html versions of the email, but the mail_admins function didn't get an html parameter until 1.3. Since we don't yet require this, we shouldn't rely on it.
Ran unit tests.