Hi, do you mean on your Mozilla Account? It's a two step process: first you add a secondary address and verify that based on a message sent to your primary address, then you switch the secondary to primary: * [[Add a secondary email address to Mozilla accounts]] * [[Change the primary email address on your Mozilla account]] If you no longer have access to the primary email address, you probably need to start from scratch with a new Mozilla Account based on an address you can access.