On Mar 30, 2013, at 10:43 AM, John C Klensin <john-ietf@xxxxxxx> wrote: > > > It sometimes feels as if anti-spam efforts are trending in the > direction of its being acceptable to accidentally discard a few > dozen legitimate messages if doing so allows blocking a few > thousand unsolicited/undesired ones. I hope we never consider > that a good tradeoff but, if we do, the decisions should at > least be made openly and with some degree of community > consensus. The trend in the market (meaning "young people") is that it seems to be preferable to discard ALL email messages just to avoid getting a few SPAM. That's a large part of why they use closed-group systems like Facebook and Twitter in preference to email. Subsequent filtering/blocking and "automatic" mailing lists (like "the list of everybody who is interested in me and that I haven't explicitly blocked") and the other big part of the appeal of closed-group systems. I've tried to imagine using Facebook-like system for IETF work, and it is strangely compelling ... -- Dean