arc {
	allow_envfrom_empty = true;
	allow_hdrfrom_mismatch = true;
	allow_hdrfrom_multiple = false;
	allow_username_mismatch = false;
	selector = "arc";
	sign_authenticated = false;
	sign_inbound = true;
	sign_local = false;
	symbol_sign = "ARC_SIGNED";
	try_fallback = true;
	use_domain = "recipient";
	use_esld = true;
	use_redis = true;
	key_prefix = "ARC_KEYS";
}