BeeDeeDubbleU - 6:54 am on Apr 2, 2010 (gmt 0)
I agree. If you choose to retain outgoing mail in sticky mail preferences for a number of days this should happen automatically and this option would suggest that it does. That's what caused the confusion with me.
Incidentally why would anyone NOT want to retain outgoing mail for at least a few days? Shoudn't this be the default?