Steve on 09 Aug, 2018 10:44 AM
welcome to the GPGTools support platform. Sorry you are having problems using GPG Suite.
From what I understand you are complaining about not being asked for the password for your OpenPGP key when decrypting an email in Mail.app?
When that happens it can have two reasons: either your OpenPGP password is stored in macOS keychain or a certain caching timing may be at work. Please see this KB-article on how to manage passwords for your keys. The article also has details how to remove your password from macOS keychain.