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> I don't understand this?! How does it abuse the technology? Why is it no > good for email? The whole point of the DNS is to delegate control to an appropriate authority, not for 3rd parties to stick their finger in an say "no we think cia.gov email should go here....". Or this address isn't as it should be. The DNS lookup doesn't say what the purpose of the lookup is. So if one was checking email addresses for validity say, have example.iy returned as example.it, might not be the action you wanted. The fundamental problems with OpenDNS arise from this blindness to purpose, and trying to poke in areas that they are not the delegated authority for (like the root zone). Which is why mistyped domains are probably best corrected by the browser, or browser plugin, as they can be application aware (know you just typed a URL in). Most browsers already do this for you anyway, as you'd have discovered if you mistyped URLs before. If you hadn't noticed this feature of most browsers, one probably didn't need OpenDNS in the first place. And yes, larger caches will produce faster DNS lookups, but in most cases the saving per novel domain is less than 1/3rd of a second last time I tested this. It really isn't a big issue for most people except people running huge mailing lists (or other mechanical reasons for multiple DNS lookups), when a local cache is usually recommended. This 1/3 of a second was measured against Demon Internet's caching DNS servers, if your DNS cache is geographically further away than your ISPs caching servers the benefits will be correspondingly less. One could of course provide large caches, without messing with the data in any arbitrary way, which would give performance benefits without creating any of the other issues. Usually DNS lookup time is only an issue if it isn't being cached locally, most browsers are over aggressive in caching DNS lookup results, in that they cache the result for longer than it is supposedly valid. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html