I use a MacBook Air and my email software is a Microsoft one (I think). Most advertising emails I receive have content, and have a section at the bottom where I can delete my subscription to the subscription or change the frequency of receipt. Some, however, shows up being said to have "no content" (which indeed they do not), and there is no place to go to delete the subscription that I can find. In a number of this type there is an address that I can write a letter to, but I am not (yet) interested in taking the time or using a stamp. Does anyone know a way to stop this?