BasilDV, Can not find Thunderbird Configuration on Thunderbird - so I tried Windows10 Microsoft Edge - same problem no downloads or uploads working. Sending email from logged on page with Firefox also does not work ( e.g. trying to email ASUS from their web site for answer to Bios update query.) Also on TPG email site trying to answer your email. Other sites also affected. I thought that this might be a Windows Problem as up until mid November this year everything worked OK. I am using Windows10 Pro Version 20H2.  64bit. Have not been able to work out how to contact Microsoft to see if they have an answer. Do not know if I am on the right track with Windows or if it is another problem. My Computers appear to be working OK on the rest of the work we do. I kind of really need help with this problem. Although I am able to acess emails on tpg post office - my wife finds it difficult to do. Regards, Barry         ... View more