When using Symantec Encryption Desktop (previously PGP Desktop) in a unmanaged environment and desire to use just one key to encrypt email to different email addresses, external users may request to use just one key for encryption.
The solution is to edit the policy so that Symantec Encryption Desktop only encrypts to a list of keys rather than try to find the specific key for the email address. Use the following steps to edit the messaging policy:
Now every email that is sent to example.com will be encrypted to the list of keys that was specified in the policy rule.