There are some scenarios where you could setup Reminder to generate emails alerts in a simple workflow scenario such as such as when a Task is completed, a helpdesk ticket is closed, a company announcement is made, a vacation request or expenses claim is approved and so on.
When you first set up this kind of reminder, an email alert for any records already in this state (e.g. completed tasks) will also be sent and some of these could be quite old, so you could end up sending quite a lot of “old” reminder emails.
If you want to avoid sending emails for these old records you have 2 options:
Use the Redirect Emails function to redirect the emails to yourself the first time its ran, delete these and then remove the redirect
This also gives you the opportunity to double check that everything is setup correctly.
Use a view to filter out old records
For example you could filter to show only records with an ID > a recent ID.
Or you could add filter to show only records Created after a certain date.
Tip – All records in SharePoint have an ID and its sequential and automatically generated. To find the id you can show the ID column in your view or see the ID in the URL in your browser address bar.