Cannot connect notification profile

I am moving a customer from legacy to pipeline notifications. I have created a new notification profile and entered the information exactly the same way as the old one, but when I test a pipeline it will not send an email.

The legacy alarming gives a checkbox to use authentication. Maybe the problem? Anything thoughts on what the issue could be? I really don’t know how to go about troubleshooting it.


Nevermind. Figured it out.

What was the issue?