dot or no dot

Because Gmail doesn't recognize dots as characters within usernames, adding or removing dots from a Gmail address won’t change the actual destination address. Messages sent to yourusername@gmail.com and y.o.u.r.u.s.e.r.n.a.m.e@gmail.com are all delivered to your Inbox, and only yours.

Gmail allows only one registration for any given username. Once you sign up for a particular username, any dot variations are made permanently unavailable for new accounts.

-from Am I receiving someone else's email?