Cant decrypt incoming Mail if on bcc

Infos:

  • Used Zammad version: 6.3.1-1721734504.b6ba68bf.focal
  • Used Zammad installation type: package
  • Operating system: Linux 20.04
  • Browser + version: Firefox and Chrome

Expected behavior:

  • Decryption of Mail

Actual behavior:

  • Cant decypt Mail
  • Trys to decrypt Sender → Primary Receiver

Any traceback / error messages?
S/MIME or PGP?