Outlook has no such option.

--
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

"Dwi" wrote in message ...
Hello,
If I send a vote email then I only want everybody to vote only once. But
there is always some people click voting button many times, althought only
their last choice is counted but I receive so many unuseful emails.
Could someone tell me how to configure my MS outlook 2003 so next time I
sent a vote email then the recipients can vote only once?

Many thanks before

Best Rgds,
Dwi