Mail.app Image view toggle.

Scripting Forums Code Exchange
,
#1

From MacOSXHints.com: This script was posted by a user who was frustrated at digging through Mail.app’s preferences to turm image viewing on/off.

OS version: OS X

tell application "Mail"
  set currentState to download html attachments
  if currentState = false then
    set newState to true
  else
    set newState to false
  end if
    
  set download html attachments to newState
  display dialog ¬
   "Download HTML attachments set to \"" & ¬
   newState & "\"." buttons {"OK"}
 
end tell