[registration-issues-wg] The Ten Worst Top Level Domains

John R. Levine johnl at iecc.com
Mon Mar 7 23:09:18 UTC 2016

> On the other hand,  how is it verifiable that a given percentage of domains
> are indeed "bad" as classified by an organization like Spamhaus?

By you?  Not at all.

I happen to know the people at Spamhaus who compiled these lists, and the 
arithmetic is quite straightforward.  They watch all the domains that go 
by in some very large mail feeds, count them all, and compute what 
percentage were in spam.  Their numbers may not be accurate to the last 
decimal place, but as a general indicator of which TLDs are failing to 
deal with abusive registrants, they're plenty accurate.


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