Re: Was Re: USB install annoyances, is, OT, hosting providers

[John R Pierce <pierce@xxxxxxxxxxxx>]

On 01/09/12 2:39 PM, m.roth@xxxxxxxxx wrote:
> I've argued before that blocks should be by source - actual source, the
> oldest "Received-From", not from the last mailer.

Those are far too easily forged, and in fact a majority of spam has 
forged Recieved headers, you can only trust the one YOUR mail server 
puts on or a chain from the latest back as far as you see trusted 
servers.   Also, by the time you've read the header, its too late to 
reject the connection.




-- 
john r pierce                            N 37, W 122
santa cruz ca                         mid-left coast

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