I want to turn off read receipts in apple mail.
I found instructions on how to turn on read receipts and followed them and they worked. Now I want to turn them off, but can't. The site that gave me the commands to turn them on says that to turn them off I go to the terminal and enter this string:
defaults delete com.apple.mail UserHeaders
However, when I do that, I get this message:
Domain (com.apple.mail) not found.
Defaults have not been changed.
I am running Mojave 10.14.1
The instructions are from October of 2018. Does anyone have any more current instruction?