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Thunderbird does not recognize certificate.

3608357 shared this question 2 years ago
Need Answer

I am tryng to configure my account in a ubuntu virtual machine in thunderbird, but it is not recognizeing the certificate and it does not allow me to accept the security exception.

Comments (8)

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This question was posted 2 years ago -- and no replies :(

I would hope I can have better luck....

I'm getting the same exact problem (with a different Email Client -- but that shouldn't matter).

Please someone post the resolution when users get "invalid Security Certificate" errors.

Attached file shows same exact error as original poster.

Mailbox.org is the only account among 9 accounts I setup in my Email Client that has the problem.

I'm sure there must be an answer -- will support please address if forum members do not have the answer.

Thanks in advance.

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What version of Thunderbird? The latest?

What kind and version of OS?

Do you get this error when you try to configure your account with Thunderbird?

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What version of Thunderbird? The latest?

Latest version (just installed an hour ago to test this out currently)

What kind and version of OS?

Windows 7

Do you get this error when you try to configure your account with Thunderbird?

Yes

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3608357 had posted the Thunderbird question 2 years ago! By now the user has probably either solved the problem or given up.

My question 2 days ago involved another Email Client that I solved by importing an Avast Certificate to the Client.

Because I've solved my problem and the original posted question is 2 years old now --- I'd say this topic can probably be closed (by moderators if that's what it takes.)

Thanks for the reply though.... :)

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Sometimes it's not a technical problem but user error/fault.

In your specific case is probably the Avast antivirus.

A lot of them install a suite that includes a browser and email certificate check.

Often they don't work well, so, if you can, disable that "feature" in your antivirus.

I found the same problem on Mozilla forum with a simple search:

https://support.mozilla.org/en-US/questions/1192349


I also found this guide from Avast: https://support.avast.com/en-ww/article/Troubleshoot-invalid-email-certificate

The same happens with HTTPS protocol in your browser. Basically your antivirus try to check if the certificate of the site you are visit is valid. If you try to click on the green lock in the URL bar in this forum you should see something like this:


0925d852bf61a5f71d4cd0e8928df7de


If you don't see "Verified by: SwissSign AG" but something like "Verified by Avast" then your antivirus is checking certificates on your browser.

Now I want to clarify that I don't work at mailbox.org, not trying to defend anyone.

Yes, they could improve the support/help desk section and answer quickly, but probably they are focused on the technical stuff now.

In the IT field, in general, there is an high probability of errors due to human factors.

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I was able to get the setup to work in the Email Client I was originally using (Interlink) by importing the Avast Shield certificate.


So it worked fine in Interlink Mail once I did this.


It's a different story for Thunderbird -- even though I do the same thing as before the setup fails in Thunderbird.


So it appears the problem still exists after two years (when the original question was posted) between Mailbox.org and Thunderbird!!!


Oh and I certainly do NOT want to disable SSL scanning in the EMail Shield in Avast just to get Mailbox.org to setup successfully -- the biggest of reasons is that after I setup all my accounts in the former Email Client Avast blocked nearly 50 malicious messages that includes Trojan, EXE, image files etc., so I don't want to compromise security just because Mailbox.org has persistent long term incompatible issues with a very popular I might add Email Client in Thunderbird.

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I was able to get Mailbox.org to work in Thunderbird by editing the "Trust" of the "Avast! Web/Mail Shield Root" to "Identify Websites" -- apparently something Thunderbird does not do that the other Interlink Email Client does already.


The Avast Help link that 1935970 has posted provides this information -- so thanks for posting (although I found that out before I checked out the link that covers what I did to get the setup to work).


Thanks all for all the feedback -- especially 1935970 -- if the original poster ever returns after two years of no feedback maybe this will help that user as well :)

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I'm glad it helped you.

I think the original poster will never come back here.

Unfortunately, his/her last activity is from 2 years ago.

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