Using thunderbird with ATT. Worked Sunday, Thunderbird did an update, now it does not work?

I have been using Thunderbird about a year. Sunday night (05/04/15), Thunderbird told me it was an update. I said 'ok '. After that, he would not AT & T access to my emails. My server settings are correct. When I bring up Thunderbird, I see this:

Unable to connect

The connection was refused when attempting to contact inbound.att.net.

   The site could be temporarily unavailable or too busy. Try again in a few moments.
   If you are unable to load any pages, check your computer's network connection.
   If your computer or network is protected by a firewall or proxy, make sure that Thunderbird is permitted to access the Web.

All these things are very good. The only thing that has changed is Thunderbird. Help, please.

Have you checked your firewall to see if Thunderbird is set to allowed. It is not uncommon for the firewall block the updates as if they were new software.

Tags: Thunderbird

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