Reports are supposed to send email each time they run, regardless of the number of results.
Perhaps you're referring to alerts, which only send email when they find results. If that's the case, change/copy the alert to a report.
Thanks for the explanation, I thought that was the case, however one of my reports is not sending even when there are no results. Perhaps it is not setup correctly. I will look into it.
Opened a ticket with support. Any time this report has results I get the email, but when no results are found then I get no email. Default behavior for reports is to get the email no matter if results are found or not... mystery.
The issue was a bug with 7.2.6 sendmail.py, upgraded to 7.3 and now I get reports even with no results found.