How to trace when user read the email??

[pfchin]

Dear all experts,

I m currently doing a research on tracing when user reads the mail i sent out to them by using php... but i couldn't find any solution so far, can anyone giv me some resources or codings tat can trace when the user is reading my mail? Thanks a billion!!!

Thanks & regards,
pf😕

[drawmack]

if you're sending the mail in html format then you can have a script that spits out an image. In the html just link to this script as if it were an image and use a parameter that let's you know which person's email this is. Then when they open the email it'll run your script and you can mark that they read the email.