Recording the number of emails opened for Mailing List reports

[stef686]

Previously I have been under the impression that this cannot be done, but looking at [URL=http://mailbuild.com/features/reports.aspx]MailBuild[/URL] it seems they have found a way.

So, my question - how is this possible?

[gerkintrigg]

specifics? They probably use a loop to echo all emails and a simple counter variable with a $count++; in the loop and an echo which prints the $count variable to the screen.

[stef686]

Ah no, sorry, I probably should have explained myself further.

What I mean is recording someone actually receiving and opening an email itself, kind of like a read receipt, so in the reports it says something along the lines of "100 of 300 people read the email"

I thought maybe a php script in an image tage (<img src="http://www.mysite.com/tracker.php" width="1" height="1" />) could do the trick, but I'm not sure if spam software would see this as some sort of malicious script and block them.