---
type: source
title: "E-Mail: Signieren & Verschlüsseln - Outlook"
tags: [email, security, outlook, smime, pki]
related: [outlook-smime-usage, dfn-adressbuch]
created: 2026-06-30
updated: 2026-06-30
authors: []
year: 2026
url: "https://rz.uni-greifswald.de/dienste/allgemein/e-mail/e-mail-sicherheit/cert/outlook"
venue: "Universitätsrechenzentrum (URZ)"
sources: ["output/rz_uni_greifswald_de_dienste_allgemein_e_mail_e_mail_sicherheit_cert_outlook.md"]
---

# E-Mail: Signieren & Verschlüsseln - Outlook

This source provides instructions on how to use Microsoft Outlook for digitally signing and encrypting emails using DFN-PKI certificates at the Universität Greifswald.

## Key Requirements
- **For Signing**: The user must have a private key and a [[dfn-pki-zertifikate]] certificate imported into Outlook.
- **For Encryption**: The sender must possess the **public key** of the recipient.

## Public Key Acquisition
The document outlines two primary methods for obtaining a recipient's public key:
1. **Direct Request**: Request a signed email from the recipient. Right-click the sender and select "Add to Outlook Contacts." 
    - **Critical Note**: If the recipient is already in the contacts list, they must be deleted first to ensure the public key is updated.
2. **DFN Address Book**: For other DFN-PKI participants, the [[dfn-adressbuch]] can be integrated into Outlook to access their public keys.

## Support
Technical issues are managed by the [[universitatsrechenzentrum-urz]] via:
- The [[groupware]] ticket system.
- The URZ hotline (ext. 1420).