Depending on the configuration, you can automatically encrypt emails by creating a respective email filter.
How to automatically encrypt incoming emails:
Click theicon in the menu bar. Click on .
The Settings window opens.
Click onin the left pane. Click on .
Click on Create new rule window opens.. The
Enter a rule name.
Click on. Make a selection from the drop-down menu. Complete the condition details.
Click on. Select the encryption action from the menu. Complete the action details.
You can set whether subsequent rules are to be processed if the rule is met. To do so, enable or disable.
Parent topic: Encrypting Email Conversations