You can update the system email password from the Admin settings. You'll need to be logged in as an Admin user.
Click the **Profile** icon and select **Admin**.
Click **System Email Settings**.
Click **Change Password**.
Update the password as required.
Click **Save**.
Click **Send Test Email**.
Enter an email address in the **Email Address For Test Notification** field.
Click **Send**.
Verify that the email is received successfully.