defaults write com.apple.mail DisableInlineAttachmentViewing -boolean true
defaults write com.apple.mail DisableInlineAttachmentViewing -boolean false
defaults write com.apple.mail PreferPlainText -boolean true
defaults write com.apple.mail PreferPlainText-boolean false
defaults write com.apple.mail MinimumHTMLFontSize 12
defaults delete com.apple.mail MinimumHTMLFontSize
defaults write com.apple.mail AddressesIncludeNameOnPasteboard-boolean false
defaults write com.apple.mail AddressesIncludeNameOnPasteboard-boolean true
defaults write com.apple.mail UserHeaders '{'Bcc' = '[email protected]';}'
defaults write com.apple.mail UserHeaders '{'Cc' = '[email protected]'; }'
defaults write com.apple.mail UserHeaders '{'Bcc' = '[email protected]';'Cc' = '[email protected]'; }'
defaults read com.apple.mail UserHeaders
defaults delete com.apple.mail UserHeaders