Step 2: You will have to navigate to the gear icon. Through the gear icon you are required to go to the settings option for Avast, which is at the top right of the user interface.
Step 3: On the settings panel, select the checkbox that says ‘silent mode’ or ‘gaming mode’. This will be found under the ‘General’ settings.
Under this option, uncheck the email signature
Don’t celebrate yet! You are not done!
Step 4: Under ‘General,’ find the ‘Active Protection’ tab.
Step 5: The Mail Shield option has a link called ‘Customize’ next to it. Click on it.
Step 6: Next you will have to open the ‘Behavior’ tab
Step 7: This will act as the final step to get the email How to fix Gmail Temporary Error 500 signature off your emails. Go to the option ‘Insert note into’ then clean message (outgoing).’ Uncheck this when you find it, and you will be done no more annoying messages.