Re: tracking forwarded emails using PHP

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On Wed, Nov 18, 2009 at 4:30 AM, Angus Mann <angus@xxxxxxxxxxxxx> wrote:
> 1. Is possible. Google the term web-bug. Be prepared that it will only work
> if the recipient has a HTML enabled email reader AND allows downloading of
> images. Be prepared also that every time the email (including forwarded
> emails) are viewed your server gets a hit. Might equal alot of hits. Just
> embed an image with a unique filename (tiny or invisible if you want) in the
> email and make it's source your server. Then track requests for that image.
>

In various environments, I use G-mail's web service, Thunderbird and
Groupwise, and all 3 disable images by default specifically to prevent
exactly what you are suggesting. I suspect many other mail clients do
the same, not to mention a lot of people use text-only e-mail clients
that cannot display images.

Most people I know don't want to be tracked like this, and if they
find you are doing it they will simply remove themselves from your
mailing list and/or direct the messages to the trash.


Andrew

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