Hey Hey,
ReadNotify (for standard emails) using 1x1 tracking to follow your
message... it inserts a 1 pixel by 1 pixel image into the HTML of the email
(If you're using Outlook for example, right click and go to View Source),
you'll see the location to that image. When this image is accessed, the
email is considered read. (so for example
hfebelingjr@lycos.com.readnotify.com) would ask you to send a read receipt
and you would say no... but then if your mail viewer retrieved images by
default, the user would still receive a read receipt.
There is also the option of sending an email to
hfebelingjr@lycos.com.silent.readnotify.com in this case when you open it,
you will not be asked to send a read receipt but if you tell it to download
images... it will notify the user that it has been read...
Best way to disable/prevent it... don't download images on your emails...
You can check your message headers (if it's not silent... and you do get a
read receipt request and you'll see X-Read-Notification: Courtesy of
ReadNotify.com - http://www.<garbage>.readnotify.com) With the silent one,
you have to look at the source... The following code is added to the email.
----SNIP----
<div alt="v2beqz3u2r6vj1."><pre> </pre><pre>
<br><Img moz-do-not-send="true" border=0 height=1 width=3 alt="0" lowsrc=""
Src=http://www.<garbage>.ReadNotify.com/nocache/<garbage>/footer0.gif><Img
moz-do-not-send="true" Border=0 Height=1 Width=2 Alt=""
Lowsrc=http://www.readnotify.com/ca/rspr47.gif ><BgSound volume=-10000
Alt='' Lowsrc=""
Src=https://tssls.<garbage>.ReadNotify.com/nocache/<garbage>/rspr47.wav>
</pre><table height=1 width=3 border=0><tr><td
background
=http://0320.185.62311/nocache/v2beqz3u2r6vjP/rspr47.gif>
</td></tr></table>
----END SNIP----
So basically preventing images from downloading... I apologize for the
rambling in there... it's late... Hopefully you understood all of this.
Peace,
HT
-----Original Message-----
From: Ebeling, Jr., Herman Frederick [mailto:hfebelingjr@lycos.com]
Sent: Monday, January 23, 2006 7:46 PM
To: security-basics@securityfocus.com
Subject: readnotify.com
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Does anyone know anything about a web site called
(http://www.readnotify.com/)? If so does anyone know of anyway to
prevent it from sending it's return receipts to the sender?
Herman
Live Long and Prosper
___________________ _-_
\==============_=_/ ____.---'---`---.____
\_ \ \----._________.----/
\ \ / / `-_-'
__,--`.`-'..'-_
/____ ||-
`--.____,-'
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Version: PGP 8.0.3
iQA/AwUBQ9Vl5B/i52nbE9vTEQI9XgCg3Nhg6Fvo0Eb8SNifD9BPzKSM4csAnivR
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=IEYv
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The Norwich University program offers unparalleled Infosec management
education and the case study affords you unmatched consulting experience.
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Computer Emergency Response Teams, and Digital Investigations.
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