In 1998, I managed to register the root@ email address with a new Dutch ISP that ran its email on a Windows infrastructure ( so on day 1 only Administrator@ was taken). I even became friends with the guy who registered info@ It took them almost a year to realize that they should have blacklisted some accounts for registration. They took it from me in the same way: a one month notice. The hardest part was that I couldn't convince them that I wasn't trolling them when I registered it. But ah well.. I was :)