Mail.app by default contacts spam servers. How can I stop this? This is what I mean: Mail.app displays spam mail (not detected as junk). I open the email which contains the spam email and image. Mail.app contacts the server and pulls the image automatically. I realised that these are usually custom image URLs which contain an identifier for my email address. So now they know I exist, damn!! I only found this out because I installed a third party firewall on my macbook. And mail.app started to contact the spam servers for images. How can I stop all images and html in a message from being loaded automatically?