Eliot, according to an FAQ in the resource center (how do I disable rejection letters?), the program won't send a blank message.
http://gossamer-threads.com/...es/Detailed/896.html In fact, I cleared out the contents of email-del.txt and deleted a link off my site that I added under my email address, and I didn't recieve an email. To make sure my email wasn't just taking forever to recieve, I also ran a targeted newsletter to myself and got the email in less than a minute, and still no message concerning the link I deleted.
--Drew