Greylisting
Our IT department installed a Greylisting filter on our server two days ago. The technique is efficient, smart and yet simple and I wonder why we didn’t hear about it sooner.
- Until August 4th, 2004: 30 spams a day or 6700 since January 1st;
- Since August 4th: 0 spam a day or 0 in total.
Small digression: Here, the Google Spell Check gives:
- Gray: 24’800’000
- Grey: 24’500’000
Which is consistent with the observation that the British term is the second more frequent.