[Keith in Iowa]

>>I'm a computer security consultant. I have a friend that runs a large ISP and tracks spammers for a living. It is trivial to spoof those headers. If you're relying on headers then you're getting bad information...guaranteed.

I've used headers to track and kill sources of spam - so don't tell me it can't be done, becuase I know otherwise.

[alwayzright]

>> I've used headers to track and kill sources of spam - so don't tell me it can't be done, becuase I know otherwise.

Define "kill sources of spam." I'm sorry but headers are nothing to spoof. Do a google search. Not to mention the fact that most spammers use relays in countries that don't give a crap about spam, so I am highly doubtful that you did anything more than annoy someone running an open relay.