I am new to Macs and have just noticed that an e-mail that I have just sent has a small thumbnail photo of myself in the top right hand corner of the mail. It is in the same bar as the address, etc. I have tried to find out how to remove it but can't find any way to do so? I only noticed it when I had a look in my sent mail folder and have no idea as to how long it has been sending the photo? Can anyone tell me how to do this please?