<A target="_blank" href="http://www.thenewdominoadmin.com/blog/?p=804&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheNewDominoAdmin+%28The+New+Domino+Admin%29">Marc Champoux says the Mail Tracking Store, while very useful, by default only keeps 30 days</A> of information. He's providing some code allowing you to change the number of days information is kept with just the click of a button.