EMAIL_UNIQUE = Setting('EMAIL_UNIQUE', True, USERS_SET, dict(
label = _("Force unique email"),
-help_text = _("Should each user have an unique email.")))
+help_text = _("Should each user have an unique email."),
+required=False))
REQUIRE_EMAIL_VALIDATION_TO = Setting('REQUIRE_EMAIL_VALIDATION_TO', [], USERS_SET, dict(
label = _("Require email validation to..."),