How To Import Email (S/MIME) Certificate – Mozilla Thunderbird?

Before following these instructions, please make sure that you have a copy of your Client (S/MIME) Email Certificate in a PFX/P12 (PKCS#12) format. Typically this file will have a .p12 or .pfx extension consisting of both your public and private keys. When exporting your Client/Email Certificate from wherever it resides there may be a option to export the private key. This option will give you your pfx file. Some applications by default will automatically include the private key  thus giving you a pfx file. Note: These instructions are based on a Windows Operating System. Locations of the options presented below may vary in other operating systems. Step 1: Importing your Email Certificate into Thunderbird: Open Thunderbird. Click on the menu […]

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