I would like add a tracking variable to an image that I can send to members of my site.
1. I want to use this tracking variable to see if they have opened my email. I know that many email programs such as gmail, block images, and only allow them to be open if the user approves them.
2. Is it also possible to see how long the viewer looked at the email, i.e. a way to know that they read the email, not just opened and closed it? - this is not critical, I am just interested.
3. Are there any other suggestions you have to help collect information for markerting, from emails? Or links to good tutorials/ scripts that you use for this?
I already have a php script to send mail with images that link back to my site, I just need to know how to track the images.
All of the emails I send, are to members of my site, so I can add a unique user ID to each email.
Please let me know what more information you will need to help me!