sendmail + mysql

To: "For users of Fedora Core releases" <fedora-list@xxxxxxxxxx>
Subject: sendmail + mysql
From: "Marcos-Fedora Brazil" <marcos-fedora@xxxxxxxxxxx>
Date: Tue, 17 May 2005 10:48:55 -0300
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I want store username/password of sendmail users in a mysql database.
I use only one domain.
What can I do?

Thanks

marcos