Ok, I see - so it picks up a graphic (I'm guessing 1 pixel will do) from a website which logs the visit (like you see Google doing repeatedly). Shouldn't be too difficult to script, I might play around with that.

  AndyD  8-)#

On 20/12/2012 22:58, Alan Bourke wrote:

On Thu, Dec 20, 2012, at 04:55 PM, AndyHC wrote:
I'm missing something here - I think every email client I have ever used
had >option>return receipt.

What this does is return a notification to the sender that the recipient
has opened the mail, without any knowledge or intervention required by
the recipient. Basically if you are the recipient and your mail client
can display emails with embedded graphics, and you haven't turned off
the option to display them*, then this thing will work.


Or been a bit more clever and blocked it at a firewall level etc.

[excessive quoting removed by server]

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