check out http://www.boomeranggmail.com/ http://www.boomeranggmail.com/ it lets you do that. you set a time when sending the email, e.g. 3pm Friday and can chec

check out http://www.boomeranggmail.com/ http://www.boomeranggmail.com/ it lets you do that. you set a time when sending the email, e.g. 3pm Friday and can check a box so if they don't respond by this date, it will bump it to the top of your inbox.