That's not a property of a DL. It's a property of the mail message. You put
the DL in the BCC field to hide recipients.

Signature
Russ Valentine
[MVP-Outlook]
>I wish to set up a distribution list but do not wish to publish the names
>of
> all the people in the group to respect their privacy. I can set the
> distribution list up ok bu when I send it all the recipients address's can
> be
> seen