| Error Code | Meaning |
|---|
| 400 | Bad request. There was a problem with your request data, see the error message
for details. |
| 403 | Incorrect username/password, or you do not have sufficient rights to access the
specified function. |
| 404 | The specified resource could not be found, for example when you try to retrieve
details of a non-existant send group, or a delivery report search which returns no
results |
| 405 | The function call was invalid. This error should not occur when using the wrapper
library. |
| 500 | An unexpected error occurred. |
| 501 | The method requested has not been implemented. This error should not occur
when using the wrapper library. |
| 503 | Service Unavailable. The Web Service is not currently available to serve your
request. |
