[Evolution] Stop Evolution Automatically Asking to Decrypt Messages

[normsmail posteo net]

Hello,

I'm using Evolution 3.36.5-0 on Linux Mint 20.3. I do not want
Evolution to automatically try and decrypt my incoming messages by
asking for my passphrase. Everything in the Security panel is
deselected but I still get the passphrase prompt when receiving an
encrypted email. How Can I turn off this feature?

thanks,

Norm