HTML email and spam tracking (was RE: [Dshield] Getting even.)

John Hardin johnh at
Sat Mar 9 01:06:29 GMT 2002

On Fri, 2002-03-08 at 15:10, Clint Byrum wrote:
> You know, this brings up a really big gaping hole in one of the most (if
> not *the* most) popular email programs... Outlook/Outlook Express. I
> don't know about other windows mail programs, but these two don't seem
> to offer any method to stop downloading images linked to in emails.
> Sure enough these all have some sort of <DEFANGED_IFRAME
> src=""> In it.
> I'm wondering if there is a good solution for this besides dropping all
> HTML email (something my users say they are dependant on). Right now I
> have about 40 domains in my squid block list.

<plug type="shameless">

Take a look at

It will defang image links as well as doing a host of other things.


We now return you to our regularly-scheduled ISP bashing.

John Hardin                                   <johnh at>
Internal Systems Administrator                    voice: (425) 672-1304
Apropos Retail Management Systems, Inc.             fax: (425) 672-0192
 "Rather than form a federation with Microsoft and work with what we
  had already created, there was this notion that the world should be
  offered an alternative."
                     - Craig Mundie, Microsoft CTO,
                       puzzled by non-MS-owned .NET user data services
 68 days until Star Wars episode II: Attack of the Clones

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