As in bulk mail of HTML-format messages? For Outlook 2000, your best bet is to use a third-party tool; see http://www.slipstick.com/mail1/html.htm

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Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> How do I set up email campaigns in outlook 2000?