## MessageValidationErrorType enumeration (5 values)

Enumerates the types of the message validation errors.

| Value | Description |
| --- | --- |
| MessageStructureError | Indicates that the message structure is incorrect. |
| EmailAddressError | Indicates that email address is invalid. |
| TransferEncodingError | Indicates that message contains unexpected unencoded non-ASCII data. |
| EmptyMessageClassError | Indicates that MessageClass is NULL or empty. |
| UnknownFormat | Indicates that this file or stream is not a MAPI or MIME type. |