ASG Vers: 8.304: EMail Encryption with OpenPGP

Our partner use OpenPGP Key with GnuPG v2.0.17 (MingW32). The public key from the partner is imported without problem. Sending to partner works. Received Emails doesn´t worked. We get e.g. *docx.gpg Word Files, which are enrypted.

(It works with other partners, which using Keys with PGP Desktop 9.9.1)

Any ideas?

Thanks a lot.

Best regards
Dirk