How to permanently turn off encrypting and digital singing of emails (Mail.app)?
How can I permanently turn off encrypting and digital singing of emails by default in Mail.app?
I' m sure that there's a way to do this using the 'defaults write' command in the Terminal.app, but I didn't find any documentation about the parameter to use.
If anybody knows this, I would be happy.
Thanks a lot.
Ulrich
MacBook Pro (Retina, Mid 2012), macOS High Sierra (10.13.6)