Install Class 1 Root and Intermediate Certificate into Mozilla Thunderbird

Solution ID:    SO12380    Updated:    10/14/2015

Problem

The Class 1 Public Primary Certification Authority Certificate in Thunderbird and the Symantec Class 1 Individual Subscriber CA - G4 have not been imported into Mozilla Thunderbird

Error Message

Thunderbird says the Digital ID is not valid.

Solution

In order to install the Class 1 Public Primary Certification Authority (Root CA) into Mozilla Thunderbird, please follow these instructions:

  • Open Thunderbird
  • Depending on the version of Thunderbird
                - For older versions of Thunderbird open: Preferences->Privacy->Security->View Certificates->CA
                - For Thunderbird V2.+ open: Tools->Options->Encryption->View Certificates->Authorities
  • Select "Import Certificate" or "Import..."
                - You'll get:

    You have been asked to trust a new Certificate Authority (CA).
    Do you want to trust "Class 1 Public Primary Certification Authority" for the following purposes?
    [ ] Trust this CA to identify web sites.
    [ ] Trust this CA to identify email users.
    [ ] Trust this CA to identify software developers.
     
  • Tick at least the second box ('Trust this CA to identify email users.')
  • Press OK and you're done.

Do the same for the Intermediate Certificate.

 

NOTE: You can find the Class 1 Public Primary Certification Authority Certificate here.

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Terms of use for this information are found in Legal Notices

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