The administration UI's E-mail Settings page allows admins to send a

test e-mail to make sure everything is working. This went through

Django's standard e-mail code, which did not use our custom DMARC

processing, logging, or other e-mail machinery.
This code now uses Review Board's EmailMessage object to construct and

send the message.

Unit tests passed.
Sent a test e-mail and verified that this still worked and invoked our

e-mail code.