I covered plain text in my earlier response, quoted below.
--
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

"Beth1976" wrote in message ...
Sue, is this also true if you are trying to send a Plain Text email mail
merge?!

"Sue Mosher [MVP-Outlook]" wrote:

Correct. Mail merge to HTML format = no security prompt. Any other mail
merge = security prompts. Works the same in 2002 and 2003.