See also [validateContent](🔗).
**Type**: void
**Parameters**
| Name | Type | Value |
| sessionId | String | ID of the session |
| mailingId | long | ID of the mailing |
| mimeType | String | MIME type (text/plain or text/html) of the mailing |
| content | String | The content of the mailing (HTML code or text) |
**Return values**
**Code structure**