Are you looking to cancel an email campaign? Having any clarification on what type of email you are looking to cancel will allow us to share the correct information with you. The good news is if you are looking to unschedule an email campaign from sending, you do have a small window to do this. Emails scheduled to "Send Now" typically send within a few minutes depending on your list size. Though once the email starts sending, you can't stop or recall it from a contact's inbox.