full-disclosure - Is the FBI using email Web bugs?

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From: lists at venom600.org (Ben Nelson)
Subject: Is the FBI using email Web bugs?

Gregh wrote:
> wont listen. In Zone Alarm you can tell it to DISALLOW Outlook Express (or
> whatever you like) access to different ports. So, I tell it to disallow
> access to or from port 80 by OE. Thus, a received HTML email with pics and
> such in it just shows blanks, "x" or placeholders, really. Now, while saying
> this, if you decided to use some other port to report back on, sure, you
> would get around this but the majority of spam operators who spam you don't
> require JUST the "click to remove" to be clicked to verify you DO exist thus
> send more spam and sell the address to another spammer. They also have port
> 80 and if the email is clicked on by a typical OE setup, just to delete, it
> "phones home". For those described earlier in this paragraph, ZA blocking OE
> in/out on port 80 stops most of the phone home stuff.

Couldn't you just block all port access from OE *EXCEPT* those that are 
needed? (probably 25, 110, 143)

--Ben