Kontakt:
EMail: info@ralf-saalmueller.de
GnuPG: öffentlicher Schlüssel aka public key
Messenger Signal: Ralf Saalmüller (https://signal.org/de/)
Messenger Wire: Ralf@ralfsaalmueller (https://wire.com/de/)
Messenger Threema: https://threema.id/784V935H (https://threema.ch)