For S/MIME-encrypted e-mail communication with poststelle@bsi.bund.de, please use the following certificates:

1. Root certificate for PKI administration: PCA-1-Verwaltung-15
   Valid: 18/08/2015 to 19/08/2025
   Fingerprint: 8E:D4:A9:36:A8:BD:E9:4E:8C:88:FA:25:1E:E2:A9:11:07:F9:89:82

2. NdB intermediate certification of Deutsche Telekom AG: CA IVBB Deutsche Telekom AG 20

   Valid: 01/12/2020 to 02/12/2026
   Fingerprint: 209A CE24 1511 3B80 071D 5FA3 A1F7 1760 4F0E 5ABB

3. Postal Department certificate: GRP Poststelle
   Valid: 17/01/2023 to 18/01/2026
   Fingerprint: 7469 34F0 A358 DC2C 447A B6DD 862A 1ADE B3D3 17E9

Please include the certificates in your e-mail client.