4 Feb
                
                    2005
                
            
            
                4 Feb
                
                '05
                
            
            
            
        
    
                2:53 p.m.
            
        On Thu, 3 Feb 2005, Edward B. Dreger wrote:
JJ> auth is sufficient to make email traceable to your own customers.
End users also would appreciate the ability to _know_ a message is not forged.
The only way to be sure is via cryptographic signature. Barring that level of immediate traceability, SPF provides a very useful data point to that end (as its *only* purpose is curbing forgery). -- -- Todd Vierling <tv@duh.org> <tv@pobox.com>