You mean you want to get rid from avast protection?
The pop server 127.0.0.1 (localhost) is necessary to avast for scanning the Inbound messages. If you do not want to use it so you do not want avast to protect your email accounts.
Close all your email programs.
Run the Mail Protection Wizard and remove avast protection.
Open your email program again. The settings will be returned to normal. If not, adjust them. But remember, you won’t be protected… :-\