Posted Sep 29, 2012 21:46 UTC (Sat) by geofft (subscriber, #59789)
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What's your setup? All it requires is being able to put a single file inside /.well-known/, or have whoever's running the web server at your domain do that. If you can't do that, I'd argue you don't in fact control the domain. (If they're sending stuff to you via procmail, they can intercept it at any point...)