Delayed Self-Pledge (DSP) is associated with a specific participation type and requires a participant pay the difference between what they will raise by a certain date and the required minimum fundraising goal. After the deadline has passed, the participant will be charged for the amount they did not raise.
When you enable the Delayed Self-Pledge filter for Coaching Emails, only participants who signed up for a Delayed Self-Pledge participation type and did not raise the required amount will receive the email.
Visit the Luminate Online help documentation for more information about Delayed Self-Pledge or Coaching Emails.