On 5/11/2011 6:51 AM, John Levine wrote:
The problem I have with this argument is that blackhole lists, in my
experience, cause a large number of legitimate messages to fail to be
Having gone to a lot of MAAWG meetings, and talked to people who run
the mail systems at every large ISP in the country, and quite a few in
other countries, I can report that their experience with DNSBLs is
utterly unlike yours. There are plenty of incompetently run DNSBLs,
but nobody uses them so they don't matter.
Badly-run blacklists do cause problems. But, then, few people choose to use bad
Blacklists are an integral part of real-world email operations today.
When thinking about the scale and number of the major email service providers,
it is not reasonable to suggest that they would continue that use were there a
significant problem with false positives.