On Thursday 02 November 2006 18:50, Nick Rout wrote: > On Thu, 02 Nov 2006 18:03:02 +1300 > > John Mallett <[EMAIL PROTECTED]> wrote: > > Is it posable to use gnupg to combat spam. And how would you do it. > > > > ie email's are signed. > > > > That way anything that is not signed could be a spam suspect. > > > > or would having an email signed preventpeople from altering the email > > headers > > does everyone you know or ever want to communicate with have: > > (a) a valid and verified certificate that YOU trust, signed by someone > that YOU trust? > > (b) the inclination to sign every email? > > Thought not! How hard would it be for the spammer to produce thousands of fake certificates.
Also If a spammer was producing those certificates. Could that be picked up by other mail servers. And could those siginaturers be used to stop spammers from falsifying mail headers
