Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

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Error Message on startup

Thunderbird Probleemoplossing
Matt beantwoord
jaylinnh
jaylinnh

When I open Thunderbird to access my Gmail I get the message: "Secure connection failed. Start.thunderbird.net uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: <a id="errorCode"title="SEC_ERROR_UNKNOWN_ISSUER">SEC_ERROR_UNKNOWN_ISSUER

When I open Thunderbird to access my Gmail I get the message: "Secure connection failed. Start.thunderbird.net uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: <a id="errorCode"title="SEC_ERROR_UNKNOWN_ISSUER">SEC_ERROR_UNKNOWN_ISSUER</as" Would appreciate help to resolve this.

Alle antwoorden (3)

Matt
Matt
  • Top 25 Contributor

What anti virus is messing with SSL certificates now?

jaylinnh
jaylinnh Vraageigenaar

Using Kaspersky Total Security

Matt
Matt
  • Top 25 Contributor

See http://support.kaspersky.com/6851

Why these folk think they can sign their own certificates defies logic for a firm that says they are about security. I do not trust them and I do not use their products because they break the chain of trust on which SSL /TLS is built.

The law enforcement folk no longer need to break encryption, just subpoena the information from kaspersky and a couple of others as they have access to the unencrypted data in their application and can easily upload it to any site they wish.