message: The email in the tracking fields is not optional
  The company does need a way to reply to the user, after all.
diff: @@ -38,7 +38,7 @@ export function trackingFields(locale = LOCALE) {
  {
  desc: t_r('email', locale),
  type: 'input',
  - optional: true,
  + optional: false,
  value: ''
  }
  ];
  