S/MIME Zertifikat Thunderbird Neu

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Get Certificate

Import Certificate in Thunderbird

Edit -> Preferences -> Advanced -> Manage Certificates

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Import -> select .p12 -> open -> enter password -> ok

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Edit Authorities

Authorities Tab -> search for your CA (DGN in our case) -> Edit Trust for every point under your CA -> Check This certificate can identify websites. and This certificate can identify mail users.

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Select imported Certificate

Edit -> Account Settings -> Security

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How to send encrypted Messages

Digitally sign Mail

  • Write -> Under Security -> Select Digitally Sign This Message

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  • The following symbol appears at the bottom right corner.

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  • After the recipient has received the first digitally signed mail, he or she has also received the certificate and thus the public key of the sender. Subsequently, further messages to the same recipient can be encrypted.

Sending encrypted messages

  • Write -> Under Security-> Select Encrypt This Message

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  • The following symbol appears at the bottom right corner.

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