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Secure Connection Faulure

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setting up a new computer, trying to set up my gmail account on Thunderbird I get this message... Secure connection failed

' live.mozillamessaging.com uses an invalid security certificate.

The certificate is not trusted because the issuer certificate has expired.

(Error code: sec_error_expired_issuer_certificate)


   *   This could be a problem with the server's configuration, or it could be
     someone trying to impersonate the server.
   *   If you have connected to this server successfully in the past, the error may
     be temporary, and you can try again later.

  Or you can add an exception…

I have 2 machines side by side, the old works just fine , its 12 yrs old, i want to use my new one... how do I fix this ?? And yes ive tried manual settings and all that.. its the certificate in Thunderbird thats expired it says

setting up a new computer, trying to set up my gmail account on Thunderbird I get this message... Secure connection failed '''''' live.mozillamessaging.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate has expired. (Error code: sec_error_expired_issuer_certificate) * This could be a problem with the server's configuration, or it could be someone trying to impersonate the server. * If you have connected to this server successfully in the past, the error may be temporary, and you can try again later.''''' Or you can add an exception… I have 2 machines side by side, the old works just fine , its 12 yrs old, i want to use my new one... how do I fix this ?? And yes ive tried manual settings and all that.. its the certificate in Thunderbird thats expired it says
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Alle svar (6)

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What is shown when you view the certificate?

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Matt, i didnt think of that, i will get you photos..

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just a screen capture as you posted in your initial topic is what is needed. I am guessing, but I think the issue may be it is issued by your antivirus.

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you may have hit it. this system has Bitdefender from NetGear. the old sys has AVG. I don’t know bitdefender well enough to know where to look or change

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j8ust disable it (windows defender will kick in) and see how things change or don't change. I do know bitdefender scans using self signed certificates on encrypted connections which is what the connection to get mail is almost exclusively these days.

See https://community.bitdefender.com/en/discussion/96023/add-certificate-security-exception

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so disable bit defender????

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