It is a free email tracking system that sends you a notification by email as soon as the recipient opens your message. It works with virtually all modern email programs: Outlook, Eudora, Yahoo Email, Gmail, Hotmail, AOL Email and many others. The system is very easy to use. In just few minutes, you will be able to use it like a real spy.

It works by using a tracking image namely a SpyPig image whose address to its remote location on our server is embedded into your email message. When the recipient opens your email, the tracking image is downloaded from our server, triggering the “email opened” alert on our system. Both you and the recipient must use an HTML-formatted email, not a plain-text or rich-text formatted email.

There are times when SpyPig does not know if the email has been opened. That is mainly due to the failure of the tracking image from being correctly downloaded by the recipient’s email program.

It is often more reliable to use SpyPig with the recipients you’ve emailed before than with those you never have. That’s because these known recipients’ firewall, anti-spyware or anti-spam software might have already “learned” about your emails, put your email address into their whitelist, and therefore would let your emails with a downloadable SpyPig tracking image through without any problem.

Visit this site at http://www.spypig.com and post your reviews as comments

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