Creating a lobby phone

you can use email subaddressing. For example if you have an account
noel.donascimento@email.com
then for the lobby phone you can use one of the following
noel.donascimento+lobbyphone@email.com
noel.donascimento+302@email.com (where 302 is a random ext. number)

Basically you can type whatever you want after the + and before the @.
You can also google email subaddressing for more info, or it's okay to ask in here.