No, you just need to choose HTML as the format of the outgoing message.

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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
>I am trying to send a mass mailing to 800 users who registered to one of our
> postings, I performed a mail merge with Word 2003 and am using Outlook 2003,
[quoted text clipped - 3 lines]
> must select it all over again... Do I need to do this for each of the 800
> emails that are going out?