Technical Creation of multiple accounts

[Hymergerk]

Hello there!
I am planning to multibox on Icecrown or Lordaeron (not sure yet) and hence need 5 game accounts.
I wanna do this the "right way" so my question is: Can i just register 5 accounts on the same gmail-address or is there another prefered way to do this?
I'm asking because some servers autoban you for registering more than one account from the same ip-address or the same email.

Thank you

[Repost]

You're free to register all the accounts you want under the same IP but you'll have to use unique gmail addresses.