Google (and many other) email providers don't support older authentication methods used by older versions of Email programs, such as Outlook, Thunderbird, Outlook Express, Eudora, etc. You may be able to get them to work by enabling 2nd factor authentication on your account, and then create an App Specific Password which is only used by your email program to check email.
Ensure 2nd factor authentication is turned on first, then go to this page: https://myaccount.google.com/apppasswords |