Thread

I remember my university turning on "grey listing". It meant that they would reject the first request from any given IP. Normal mail programs would retry, but spam not. This made all the difference (but really disrupted email delivery for a few weeks).

@rorcde The argument with Gmail was that they had a more global view and so on... But yeah, it's still not perfect, but good enough, I think. I remember people talking about that "spam would destroy the Internet."