Error codes
| Status Code | Substatus | Case | Description |
|---|---|---|---|
| E:400 | 1 | 1 | The submitted Core ID is deemed invalid |
| E:404 | 1 | 1 | The recipient's email address is invalid |
| E:404 | 1 | 2 | The recipient's email address is invalid |
| E:406 | 1 | 1 | The message lacks valid OpenPGP/GPG encryption. Locate the recipient's public key on a server such as keys.openpgp.org |
| E:406 | 1 | 3 | A required PGP/GPG signature was not found |
| E:500 | 1 | 1 | The recipient's email address occurs error |
| E:500 | 1 | 2 | Failed to load the recipient from the database |
| E:500 | 1 | 3 | Failed to forward message to recipient |