This simple PHP script will allows you to track open or not HTML emails. This feature you can also add in your web application also if you have continuously send email to your customer for reach. Below you can find step by step source code for email open tracking PHP script.
A ready-to-use PHP script for sending Emails with an HTML Template will use a Gmail account as the sender and you will not need any email server. Powered by PHPMailer.
Ejemplo de uso de PHPMailer
Comment paramétrer et utiliser PHPMailer pour vos formulaires de contacts ou pour envoyer des mails
To associate your repository with the phpmailer-using topic, visit your repo's landing page and select "manage topics."