Awesome Email open tracking with PHP and MySQL

Sometime last year, I wrote about super awesome email open tracking using PHP and MySQL, and I’ve since ALSO updated that one to be EVEN MORE SUPER AWESOME! Tracking email open rates is both very valuable, and very useful, particularly if you run a service where statistics are important, or in scenarios where more detailed information on users (namely their participation with site content outside the website is crucial). That being said, a couple things […]