Since spammers change their email addresses frequently, this is not a useful tactic. A better course of action, given your Outlook version, might be to get a generic antispam tool that can work with any mail program -- not one of the Outlook-specific applications, which are pretty much confined to Outlook 2000 or later.
--
Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
Microsoft Outlook Programming: Jumpstart
for Administrators, Power Users, and Developers