Start.thunderbird.net uses an invalid security certificate

1. How to disable Sec_error_reused_issuer_and_serial in Firefox?
2. How do I add a Certificate exception in Thunderbird?
3. Where is certificate in Thunderbird?
4. How do I accept Security certificates?
5. How do I manually install a certificate?
6. Why is Thunderbird not accepting my password?
7. How do I allow a certificate?
8. How do I fix resolve secure connection failed?
9. What causes secure connection failed?

How to disable Sec_error_reused_issuer_and_serial in Firefox?

Error code: sec_error_reused_issuer_and_serial. To eliminate this warning, open the Firefox browser, browse to the Show All History dialog box, right-click the site that is causing the error, and then select Forget this Site.

How do I add a Certificate exception in Thunderbird?

In Mozilla Thunderbird, go to Tools > Options > Advanced > tab Certificates. Click on View Certificates and go to tab Servers. Click on Add Exception. Enter the name of your mail server and click on Get Certificate.

Where is certificate in Thunderbird?

1. Go to your email account profile by selecting your email address on the left-hand menu, and then to open your account settings, select View settings for this account. 2. Select Security and then View Certificates to open your Mozilla Thunderbird Certificates Manager.

How do I accept Security certificates?

Navigate to the site with the cert you want to trust, and click through the usual warnings for untrusted certificates. In the address bar, right click on the red warning triangle and "Not secure" message and, from the resulting menu, select "Certificate" to show the certificate.

How do I manually install a certificate?

Import the certificate into the local computer store

In the Open box, type mmc, and then select OK. On the File menu, select Add/Remove snap-in. In the Add/Remove Snap-in dialog box, select Add. In the Add Standalone Snap-in dialog box, select Certificates, and then select Add.

Why is Thunderbird not accepting my password?

Go to the Tools menu and select the Account Settings option. You can also select Account Settings from the application menu. Once in the Account Settings, choose the Server Settings from the left pane. Ensure that you have correct Thunderbird login information in the right pane, and that should do the trick.

How do I allow a certificate?

If you want to turn on SSL/TLS trust for that certificate, go to Settings > General > About > Certificate Trust Settings. Under "Enable full trust for root certificates," turn on trust for the certificate.

How do I fix resolve secure connection failed?

The easiest way to fix this secure connection error is to reset the Firefox settings. If that doesn't work, disable DNS over HTTPS or create a new Firefox profile. Disable the VPN client or proxy service. Your VPN and proxy service can interfere with the connection.

What causes secure connection failed?

Hence, Secure Connection Failed error is typically related to the security certificate (otherwise known as SSL) not being valid, expired, or simply missing. This notification quite often has merit, as the browser tries to warn that the connection is not secure, and you might suffer from serious issues if you proceed.