eMail Services like Constant Contact use this kind of technique to track
email openings.
Robert C
On 3/22/13 10:22 AM, Owen Densmore wrote:
Yesterday, I noticed in the middle of the "You just went to the Google
homepage" conversation, my GMail "accept this image" banner was on,
but I could see no image!
WTF?
So I look at the raw source, and indeed, this appears:
https://app.yesware.com/t/ac60524099a2c2922efb3fea7fcd30ecf03a1=482/5bb54418d45ddd9646340c46dfba6e56/spacer.gif
.. which when downloaded was a single pixel, invisible due to alpha=0
and possibly being white.
This seems to be a way of knowing when the mail was opened, the
yesware.com <http://yesware.com> site can collect statistics on the
image being displayed.
Is anyone doing this on purpose? Or have you caught a malware in your
mail client that is looking at your usage? Or is it simply part of an
obscure formatting stunt?
BTW: This then appeared in all the rest of the conversation which
included the initial email.
-- Owen
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