I have been a Thunderbird user for years. I check email from my phone, browser, etc. with no problems. Recently, Thunderbird never connects to email server. I use Thunderbird to store my old messages. When this started, I downloaded the most recent Thunderbird and got the same results. I have changed nothing in my setup. I get "scubadug@netzero.net: Host contacted, sending login information..." message, which apparently eventually times out.