Read-receipts
How do you get "read receipts" for emails sent out in OS X?
MacBook Pro (13-inch Late 2011), OS X Mavericks (10.9.2), Trust Certificate error message
Apple Event: May 7th at 7 am PT
How do you get "read receipts" for emails sent out in OS X?
MacBook Pro (13-inch Late 2011), OS X Mavericks (10.9.2), Trust Certificate error message
http://email.about.com/od/macosxmailtips/qt/et_request_recp.htm
Probably not worth all the work.
If you really wish to annoy your recipients, you could find another email client which supports them. I don't know which ones do. Mail doesn't
Read-receipts