compuserve anyone
All email addresses were originally numbers, no problems with duplicates or funny spellings. From memory it was n.n@compuserve.com. I remember how exited I was when it was announced that names would be supported and we could apply for our name related email address.
The article does bring back memories of 20+ years ago of me swearing under my breath everytime a request came through for someone wanting to change their name due to marriage or divorce, used to take between half a day and a day to sort it all out depending on how many systems their single logon had access to. Happy days.