Continue to be "unable to connect" all settings OK?

Everything OK three days-"impossible to connect" since then

If this happened immediately after an update?

If nothing can come in or out, please check your firewall/anti-virus first settings.

Close Thunderbird.

Example: I use Norton Anti-anti-virus/firewall.
Sometimes, after an update, Norton still thinks it can afford than the previous version.
I then close Thunderbird and go to Norton.
Settings > network > Smart Firewall > program rules
Locate the Thunderbird and set to "allow".
On one occasion, I had to block them, ok and then go back and put back to allow.

If you are using another firewall/antivirus program, then there will be similar parameters.

Tags: Thunderbird

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