Had real trouble with a .technology TLD a couple of years ago. A large number of major sites (who were big enough to know better) simply refused to accept it as

Had real trouble with a .technology TLD a couple of years ago. A large number of major sites (who were big enough to know better) simply refused to accept it as a valid email address. We had to make throwaway accounts to use any of Atlassian's products for a while.