On Wed, 5 Mar 2003, Clifton Royston wrote:
People might want to look at the recently-implemented Postfix
sender verification feature in current snapshot releases.
This technique is patented and assigned to ESCOM Corporation, in US
Patent #6,321,267 (see the section "Active User Testing")
The patent was filed 23 November 1999; if you think you have prior
art, I encourage you to publish it.
for what it's worth, source code to do this has been available since at
least Jul 9, 1997 at ftp://cs.utk.edu/pub/moore/check_mail_addr.tar.gz
if this were enough to get this patent declared invalid, it would make my day.
Keith
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg