UNABLE TO RE-ADD MAIL ACCOUNTS TO THUNDERBIRD For the last three or four months I have been getting two separate messages in the bottom of the screen when opening Thunderbird on my laptop. "GMAIL settings are out of date" and "Yahoo settings are out of date". Then, a about a month ago when I opened Thunderbird I noticed that it was trying to download almost 3000 Gmail emails. I had always believed that only new Gmail messages would download on start up? Whilst this was happening it was impossiblle to do anything on my laptop as I had limited internet access. The only way I could see to stop this was to delete my Gmail account from Thunderbird. When I opened Thunderbird I continued to get the messages "settings are out of date" for each of my mail accounts. So I deleted my email accounts from Thunderbird with the intention of re-adding them. I then downloaded and re-installed Thunderbird to ensure I was on the latest version. I then tried to re-add my mail accounts, letting Thunderbird find and load the correct email settings for each account but I now get an error message saying "Unable to Log In at Server. Probably wrong configuration, username or password". Refer to attached screenshot. I can log in to my Mail Accounts OK using Firefox so I know my username and password are correct. I also tried adding my mail accounts manually in Thunderbird but I contiue to get the same message. I am unable to add my mail accounts to Thunderbird and I have run out of ideas regarding diagnosis and resolution. I need help please.