Disable Inline Images and PDF viewing within Mac Mail

If you need to turn of inline images and PDF viewing within Mac Mail open up the terminal and use the following command:

defaults write com.apple.mail DisableInlineAttachmentViewing -bool yes

If you change your mind and want it back again use this command:

defaults write com.apple.mail DisableInlineAttachmentViewing -bool false

This saves the frustration of others that are using different mail clients from not being able to get to your attachment.

I found this information out here.