Ask the team

{ "first_name": { "required": true }, "last_name": { "required": true }, "email": { "required": true, "email": true }, "message": { "required": true } }
{ "first_name": { "required": "Required field." }, "last_name": { "required": "Required field." }, "email": { "required": "Required field.", "email": "Invalid e-mail." }, "message": { "required": "Required field." } }