---
type: concept
title: Thunderbird Certificate Import
tags: [tutorial, thunderbird, smime]
related: [mozilla-thunderbird, smime, p12-file, email-zertifikate]
created: 2026-06-30
updated: 2026-06-30
sources: ["output/rz_uni_greifswald_de_dienste_allgemein_dfn_pki_zertifikate_nutzerzertifikat_thun.md"]
---
# Thunderbird Certificate Import

The process of integrating [[dfn-pki-zertifikate]] into Mozilla Thunderbird to enable [[smime]] functionality.

## Step-by-Step Procedure
1. **Import the Archive**:
    - Navigate to **Account Settings**.
    - Select the university account.
    - Go to **End-to-End Encryption**.
    - Click **Manage S/MIME Certificates...** and import the [[p12-file]].
2. **Assign Certificates**:
    - Under **Personal Certificate for Digital Signature**, click **Select...** and choose the imported certificate.
    - Under **Personal Certificate for Encryption**, click **Select...** and choose the imported certificate.
3. **Configure Defaults**:
    - Enable **"Digitally sign unencrypted messages"**.
    - **Recommendation**: Do not enable "Encryption for new messages" by default, as this requires all recipients to have a certificate.

This process complements the [[outlook-certificate-import]] workflow.