Sender Policy Framework
A DNS txt record based mail server verification system. Its homepage is at http://spf.pobox.com .
2004-05-19 SRIV If anyone has started working on a tcl implementation of SPF and would like to share, please place your code here. Otherwise, I'll be writing one and placing it here soon.
2004-05-21 SRIV News today on Slashdot that SPF and Microsofts email Caller-ID scheme may become merged. We need to pay attention to this..