OlAttachmentBlockLevel enumeration (Outlook)
Specifies whether there is any restriction on the type of attachments for an item.
| Name | Value | Description |
|---|---|---|
| olAttachmentBlockLevelNone | 0 | There is no restriction on the type of the attachment based on its file extension. |
| olAttachmentBlockLevelOpen | 1 | There 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. |
Remarks
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 website.
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