The more sophisticated web bugs do not use a parameter, but instead actually use the filename itself to identify the individual and each email has a different image being requested. Quite effective in HTML email and on web pages.
Justin > -----Original Message----- > From: Lee Fuller [mailto:[EMAIL PROTECTED]] > Sent: Monday, January 13, 2003 1:24 PM > To: CF-Talk > Subject: RE: web beacons > Yep.. One of the ways that spammers, these days, collect info > on valid email > addresses when using HTML email campaigns. You simply view > the email, and > BAM.. they know your email address is good. > > Old news > > > > | -----Original Message----- > | From: Costas Piliotis [mailto:[EMAIL PROTECTED]] > | Sent: Monday, January 13, 2003 10:04 AM > | To: CF-Talk > | Subject: RE: web beacons > | > | > | Oh yeah, and you can pass url parameters to that image as > | well... So let's say you send an email to employeeid 145. > | > | You can add a parameter the the src of the gif file in the > | html email you send him as such: > | > | <img src="http://www.myserver.com/image.cfm?id=145";> > | > | Then in the source... Of image.cfm, something like this > | appears: <cfcontent file="foo.gif" > | type="application/whatever"> <cfquery datasource="#application.ds#"> > | insert into someTable (employeeid, date) > | values (#val(url.id)#, getdate()) > | </cfquery> > | > | -----Original Message----- > | From: Costas Piliotis > | Sent: Monday, January 13, 2003 10:00 AM > | To: CF-Talk > | Subject: RE: web beacons > | > | > | Easy. > | > | <cfcontent file="foo.gif" type="application/whatever"> > | <cfquery datasource="#application.ds#"> > | ...tracking query here... > | </cfquery> > | > | You include the image, and some server-side code to process > | it. Done it a few times... > | > | -----Original Message----- > | From: sebastian palmigiani [mailto:[EMAIL PROTECTED]] > | Sent: Monday, January 13, 2003 9:52 AM > | To: CF-Talk > | Subject: web beacons > | > | > | Yahoo is using something called web beacons. Can anyone > | simply explain how a single pixel gif is used as a web beacon. > | > http://privacy.yahoo.com/privacy/us/pixels/details.html > > > Sebastian > > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting. Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
