I am using my ISY99i v3.2.6 with SmartHome Insteon.  Love it!  My ISY99i is fully established on the internet and I am able to use it from my smartphone.  About 1 week ago I set up notifications and they worked until yesterday.  When I set up Emails/Notifications, Settings/Groups, I checked the box in SMTP Settings to "Use Default."  Worked fine but now quit sending.  Also the "Test" feature no longer works.  Tried establishing a new group also but still not working.  Any thoughts what I am doing wrong or not doing?  What changed?  Could it be because I'm using the "Use Default" setting?  Thanks!