From: Anton Sherwood (bronto@pobox.com)
Date: Thu Feb 21 2002 - 15:14:36 MST
"Perry E. Metzger" wrote:
> The people trying to track receipt put zero size GIF references into
> the message. You try to fetch them and they know you've got the mail,
> you notice nothing. A lot of firms have been doing this for a while
> now.
For example, I've had at least one such `bug' every day for the past
week. Apart from bogus `remove' lists, it is the spammer's best trick
for confirming the 39 million addresses they bought.
-- Anton Sherwood, http://www.ogre.nu/blog/blog.htm
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