Comment Re:Summary (Score 3, Informative) 175
The short story: "Mailinator is a free, disposable email service". Some site operators wants to block people with this service from registering. There's a way of listing all the domains used by Mailinator (by generating a bunch of new throwaway addresses?). Mailinator in turn has a way to detect when a script is trying to go through this list.
The amazing idea is to detect when a script is scraping this list, and feed it bogus data like "gmail.com".