Periods have always been discarded by Gmail when routing mail, as well as signing in. If you own firstlast@gmail.com, you've owned first.last@gmail.com all alon

Periods have always been discarded by Gmail when routing mail, as well as signing in. If you own firstlast@gmail.com, you've owned first.last@gmail.com all along, as well as fi.r.s.t.la.s.t@gmail.com for that matter. You're getting that other person's email because someone has the wrong address for them.