The interval tells the system how often it should look for a task activity which may trigger a notification. If you have tasks which are relatively short in duration you may want to set the interval at 10 minutes. If on the other hand you have tasks which last for days or weeks you may want to set the interval for a longer period. To set the Interval from the Start menu select Programs... EasyTaskLink...Utility...FileService. From the EasyTaskLink File Service screen select Configuration...E-mail Configuration. You may have to consult your IT department if you select to Customize your outgoing SMTP setting.