Hi lvharris,
I have great news. When I logged into your account with the MethodSupport username, when I entered your full e-mail address in the Email User Name field for the default e-mail settings, I was able to successfully test sending a single e-mail to myself within an activity.
I also send you a test e-mail for the activity within your account. Can you please confirm that you have received this e-mail.
Ronen