Folks, EBD> ... SPF isn't EBD> perfect, but it's something now, and IMHO probably better than This is a very popular view these days. However there are some fundamental problems with it: 1. It mistakes activity for progress. 2. It ignores opportunity cost, diverting energies to efforts that are likely to have no effect on spam rather than allocating those resources to basic improvement in the service. 3. It ignores the difficulties with administration and operation of the mechanism, as it scales, such as its Procrustean limitation of usage scenarios that are reasonably supported. 4. It treats a short-term mechanism as if it had long-term benefit; yet modification of a global infrastructure is always and only subject to long-term processes. If SPF is wonderful, it had better satisfy a higher criterion than that it "isn't perfect, but it's something now". d/ -- Dave Crocker <mailto:dcrocker@brandenburg.com> Brandenburg InternetWorking <http://www.brandenburg.com> Sunnyvale, CA USA <tel:+1.408.246.8253>, <fax:+1.866.358.5301>