If you wish, you can also communicate with us via OpenPGP encrypted email.
Encrypted email communication is not yet common practice. It's not particularly complicated. A PGP-capable email client is required and a PGP certificate for the corresponding email address.
Please send us a short message to exchange the certificate.
For information or help please consult your network and/or mailbox administrator.
See also https://keys.openpgp.org/