EmailNotifier is an add-on for nearly every e-mail-client (like Outlook, Outlook Express, or Pegasus). It adds a (optional: hidden) link to every outgoing message. As soon as the receiver opens the message you will be informed. You will get information about date, time, and IP-address of the read operation. The e-mail tracking works without approval or help of the receiver.
Version 1.5 build 361 may include unspecified updates, enhancements, or bug fixes.