Attachment.BlockLevel Property

Returns an OlAttachmentBlockLevel constant that specifies if there is any restriction on the attachment based on its file extension. Read-only.

Namespace:  Microsoft.Office.Interop.Outlook
Assembly:  Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)

OlAttachmentBlockLevel BlockLevel { get; }

This value of this property reflects whether an attachment is blocked based on its file extension and how attachment security has been set up on the client computer. For more information on attachment security in Outlook, see the Office Resource Kit Web site.