I am unable to access any email on my Windows 11 computer, regardless of the email server (tds or gmail) or the browser (Firefox or Edge) used, and even when Bitdefender is turned off.

I turned off my HP computer with Windows 11 on August 1. Everything was working fine at that time. When I turned it on again on August 18, everything worked except email. I can get email on my iphone, but not on my computer. I spent over an hour trouble-shooting with someone representing my email server, tds.net, with no resolution. I tried to access my email thru Firefox, my usual browser, as well as thru Edge. The message I get when trying to access my tds email is: "The connection has timed out. The server at mail.tds.net is taking too long to respond." I then went to an IT specialist who tried everything he could, including disabling Bitdefender, and nothing worked. I then tried to open an email account with gmail.com and received this message: "The page isn’t redirecting properly. Firefox can’t connect to the server at accounts.google.com." I don't know what else to try. Everything I read said the it is likely a problem with my anti-virus software, but the problem still exists when that is turned off. Is there anything else I can try???