ActiveTracker for Outlook 2.0
This plug-in for Outlook adds a button to your "Compose Email" screen allowing you to track your e-mails.
Full Tracking allows you to find out when your e-mail gets opened, how long it is read for, where the reader is located, whether or not it gets printed, forwarded or published online, what URLs or Web links were clicked and how many times it was was re-opened. It also provides retractable e-mail, time stamped and signed e-mail certificates, password protection, self-destructing e-mail and blocking of printing, saving and forwarding.
It also supports sending receipts to SMS, pager, ICQ or Web pages.