So this one is puzzling me and my boss asked if I could look into it. She received an email from Ulta beauty about a big sale they were having that only lasted a few hours. She went back later in the day and pulled up the exact same email and the text/picture inside the body of the email had magically changed saying "this event has ended." So how is that possible? How can the text change in an email already sent?? Help me understand!