MS Outlook headers in URL of email for PHP (POSSIBLE?)

Ok.. this is a weird request, but let's see if its possible.

If I write an email to a group of people and I make the email in HTML format. I want to put a URL in the email and append to the end of the email that person's email address (who is reading). Is it possible to get the headers of the person who clicks on it automatically? Maybe append their email address.

Basically, I want to send an email to a group of people and I want to be notified (without using Microsofts notification method) who had read the email. If I get them to click on a URL, I can automatically (with PHP) log the fields on my server.

Any ideas?

Select name, email from users where receiveemail=yes

$row=mysql_fetch_array for the query

while $row
{
send email to row->$email with subject $subject and body with click here url=site/log.php?user=$email
}

yeah, it's not all in php, in fact, it's not all in PHP, but it lets you know how to do it.