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Connection to Thunderbird was refused.

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On opening up Thunderbird noticed no emails for 2 days I'm told "Could not connect to mail server. Connection was refused." So cannot send/receive emails! Firefox is working o.k.

On opening up Thunderbird noticed no emails for 2 days I'm told "Could not connect to mail server. Connection was refused." So cannot send/receive emails! Firefox is working o.k.

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Thunderbird is software running on your computer and it does not connect to anything Thunderbird. The error message is from your email providers server. Have you contacted them to see if they have issues?

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It appears that my IMAP4 mail server has my email address in it and is therefore not allowing my access to Thunderbird. How can I rectify this problem?

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Your statement make no sense.

What is "your IMAP mail server"?

Do you have the correct server settings for who ever your email provider is?