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OlAttachmentBlockLevel Enumeration

Specifies whether there is any restriction on the type of attachments for an item.

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

public enum OlAttachmentBlockLevel

Member nameDescription
olAttachmentBlockLevelNoneThere is no restriction on the type of the attachment based on its file extension.
olAttachmentBlockLevelOpenThere is a restriction on the type of the attachment based on its file extension such that users must first save the attachment to disk before opening it.

Attachments with the BlockLevel equal to olAttachmentBlockLevelOpen are on the Level 2 list of attachments that administrators maintain for attachment security. For more information on attachment security in Outlook, see the Office Resource Kit Web site.

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