Hello everyone,
I'm using the mail() function for following up some customers at my online-service.
Is it possable, or is there a function, for making a "request for read receipt" such as in outlook? I want to se if the message is delivered, deleted etc.
Please someone... 
Best regards
Tore
if you want a return receipt, all you have to do is add a header
Disposition-Notification-To: <you@yoursite.com>
and if their mail client supports it and they accept, a return receipt will be sent to that address. but they still will be prompted for it and can click deny, or their mail client may not do anything with it.
That is all I need to know ... simple as that 
Thank you very much
no problem. the other little trick i use sometimes is to send an html email with a little 1x1 transparent image at the bottom, and call it like <img src="http://mysite.com/image.php?addr=xxx@xxx.com"> and have a php script output the image and log the email to a file.
its a bit sneaky and certain email clients now are blocking images unless the user clicks a show button. but the two combined could do okay for you.