We have Email Routing setup in Admin Notifications settings.
As a test, the form is set to fail that routing so no email is sent.
If we go to an Edit page for one of that forms entries and click on Admin Notification and click on Resend Notifications we get the message: "Notifications were resent successfully."
This is not correct as the routing is stopping the email from going out. There should be a message saying that the email resend failed.
(might this be fixed in version 1.7?)