UPDATE (Please Use Below as Reference for UI Scripting): https://heesoo.org/2019/04/10/much-improved-load.html
One feature that I miss using OS X Mail.app was being able to Load Image using Keyboard Maestro app as AppleScript trigger. This allows me to selectively only load remote image on emails that I want to load and be tracked. Thanks to UI Browser app to poke around the MailMate UI, I got following code to work:
https://gist.github.com/heesoo/2cfdf55045c1d8d235576865f507bb89
– version 2018-04-20_01 – by https://heesoo.org tell application “System Events” tell process “MailMate” – For View Layout Thread Arcs, Three Panes & Widescreen try set loadImagesButtonRef to a reference to button “Load Once” of group 2 of splitter group 1 of splitter group 1 of window 1 end try – Case for Search was activated (by clicking or by search box) if not (loadImagesButtonRef exists) then try set loadImagesButtonRef to a reference to button “Load Once” of group 4 of splitter group 1 of splitter group 1 of window 1 end try end if if not (loadImagesButtonRef exists) then return beep 1 – Click “Load Once” click loadImagesButtonRef end tell end tell