The only way to "truely" stop spam is for organizations like the "US Postal Service" to get up-to-date with technology and run a set of secure servers across the country to deal with nothing but eMail. These servers would talk to thier own eMail clients and not have anything to do with any other server outside of their trusted set of servers. End of story. Any other solution will be "forged" or "compromised".
The only way to "truely" stop spam is for organizations like the "US Postal Service" to get up-to-date with technology and run a set of secure servers across the country to deal with nothing but eMail. These servers would talk to thier own eMail clients and not have anything to do with any other server outside of their trusted set of servers. End of story. Any other solution will be "forged" or "compromised".