Yakov Shafranovich wrote:
The problem is that mail administrators manage to evaluate blacklists
based on their effectiveness not their reputation. This would lead to
the blacklists which block the most IPs, being the most effective.
However, there is no evaluation done on whether any innocent email is
being blocked as well.
That's a rather extreme assertion. And wrong. We certainly do this
evaluation. Continuously. Otherwise, I wouldn't be able to tell you
that the CBL blocks 78% of all of our spam, and has a .004% "whitelist
rate" (meaning: we've had to whitelist .004% of the total CBL blocks
that there would be).
There are a number of web sites carrying effectiveness/FP comparisons.
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