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Can not send or receive emails, says server is timed out

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Yesterday I became unable to send or receive emails. The error message says Thunderbird is unable to connect to my SMTP server. How do I fix this?

Yesterday I became unable to send or receive emails. The error message says Thunderbird is unable to connect to my SMTP server. How do I fix this?

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have you restarted your device?

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Yes, multiple times.

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Please check your Firewall which may be part of your Anti-Virus product.

Thunderbird must be an allowed program in the Firewall.

If it is already selected as allowed: Exit Thunderbird. then block/remove Thunderbird from list, save and exit Firewall. Then access Firewall again and set Thunderbird as an allowed program. It is possible, a new upgraded Thunderbird is not being recognised as the Thunderbird in the Firewall list. Then start thunderbird.

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