@webgovernorMar 19.2008 — #Not with PHP (that I know of). But it's possible with some clients, by requesting a read-receipt. However, this is only if you choose to send the receipt.
@felgallMar 20.2008 — #Any sensible person has the "never send a read recipt" option in their email program turned on so as to ensure that they don't accidentally send one to a spammer. The only way to guarantee a read receipt is for the emails recipient to hit the reply button in their mail program and reply to your email.
@_eric_meMar 20.2008 — #Any sensible person has the "never send a read recipt" option in their email program turned on so as to ensure that they don't accidentally send one to a spammer. The only way to guarantee a read receipt is for the emails recipient to hit the reply button in their mail program and reply to your email.[/QUOTE]
You could try the invisible image method (attach an invisible image from the server and have it download once the user opens the email). The download is captured by the server.
However, this isn't a fool-proof way to do it because it has to be an HTML email and the accepting email must accept HTML emails and not have images disabled.
There are "hacks" to do it, but like felgall said there is not a 100% guaranteed way to do it.
You also could do the image hack thru your site by having the image source kick back to a php page on your server.
Thanks for your valuable suggestion.I have gone through your method and it works.What I did,I embeded an img src in the mail content which links to a external php file with the receiver's email as a param.
Thanks for your valuable suggestion.I have gone through your method and it works.What I did,I embeded an img src in the mail content which links to a external php file with the receiver's email as a param.