## ValidationResponseCode enumeration (4 values)

Represents the response status of the mail validating process.

| Value | Description |
| --- | --- |
| ValidationSuccess | The mail address validating is successful. |
| SyntaxValidationFailed | The mail address validating process failed at the syntax validation. |
| DomainValidationFailed | The mail address validating process failed at the domain validation. |
| MailServerValidationError | The mail address validating process failed at the mail server validation. |