This is so annoying. If would be better if the user decides in the Options (settings), what he or she wants to do with image by default?
always resize,
never resize,
always ask.
Simple. And there will be no unnecessary interruptions in the user workflow.
I searched on the forum - people complained about it several times.
Message text:
You are about to attach a large image. Would you like to resize it down to 1920 pixels before attaching it?