Email Configuration

Which of the email settings in the Jazz Admin Email Settings page are considered required fields? I set the SMTP Server field to the setting our Lotus Notes admin stated to set it to, set the port to 25, and set Enable to Yes.

I also inputted the user's email addresses in their profile and checked all the boxes for what to be notified on.

Currently there are no emails being sent out. I had this working on one of the Betas.

Any ideas on how to debug this?