Prerequisite
C-panel log-in credential is required
Implementation

Step 1: Log in to your cPanel.

Step 2: Click Encryption under the Email section.

Step 3: Follow these steps on this page,

1. Type the Name on the first text box.

2. Type the Email ID.

3. Type a Comment or Nickname for the message.

4. Type a Key password and confirm it

5. In the password Generator Type a time frame, the key will be valid only in this time frame.

6. Choose the Key Size either 2048 or 4096.

7. Click Generate key.

Step 4: Now you have successfully created the encryption key for the Email message.