Mark Parnell <we*******@clarkecomputers.com.au> writes:
Set your email program to request a receipt when they read it. Some
people may refuse them, but it's likely the most reliable method of
achieving what you want.
Perhaps. Most privacy concious too.
Luckily, no. But there's no way you can guarantee HTML will display when
they read the email either. What if they read their email in plain text?
True.
Besides, HTML can't *do* anything. It is a markup language. It simply
describes the structure of the content.
Not quite true.
For each of the HTML emails one sends;
<img src="http://senders.webserver.com/foo.php?recipient=some_name">
Where the script logs the recipient query parameter and goes on to
output the image which is then just another part of the visual content
the recipient sees.
Javascript can be used also to have the page tickle a remote server
when the file is loaded. And so, assuming each of the recipients got
a customized version of the email, just about any datum can be passed
to the webserver and logged on a per recipient basis.
I have never used this approach and question the privacy implication
of tracking recipient actions like this.
YMMV
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