Yes. I made the same conclusion. I had the opportunity to talk about it to the mail adlinistrator of a big internet access provider here in France. There is ind

Yes. I made the same conclusion. I had the opportunity to talk about it to the mail adlinistrator of a big internet access provider here in France. There is indeed more than 95% spam but 4 servers is all it takes to manage 4 million users ! The mail network traffic % is also peanuts compared to youtube and others. The only real nuisance for mail administrators is when they black list each others by automatic black listing systems. A human intervention is required to sort it out. The cost is thus still too low to justify adoption of my system. On the other side I had an interesting discussion with a big company manager. When I pitched him about my system, he immediatly calculated the cost of spam. With a few tens of seconds per day per employer to filter out the handful spam managing to get through the filters he came out with a cost around a million euros per year. A system sold for a hundred tousand euros to this company could make it. But this doesn't solve my network effect problem. Access providers don't have such incentive. This confirms that B2B would be the way to go.