Mac Pro, Mac Mini, iMac, MacBook, MacBook Pro, iPad, Displays
Apple Mail Security
Spammers like to send emails with tiny 1 X 1 pixel images; if the image is loaded, they know they have a “live one”. Don’t do this to yourself, it’s just inviting more spam.
Make sure thebox is unchecked as shown below.
When reading a mail message, you can alwaysin any particular email by clicking the Load Images button at the top right of the mail message.