Email notification test bug?

I created a new notification of email type and saved it. When I try to use the test button I get an error “Invalid TO address”
However, the notification DOES work. I downed a device and the email notification worked like it was supposed to.

Perhaps the mailadres you use isn’t a ‘full’ address (with @domain.ext) and therefore The Dude thinks it’s invalid?

Same error here, the email TO: is correct user@domain.ext

Any ideas?