extern val mailman_place_to_web_node : mailman_place -> web_node;
extern val mailman_place_to_node : mailman_place -> node;
extern val mailman_place_to_ip : mailman_place -> ip;
extern val mailman_place_to_web_node : mailman_place -> web_node;
extern val mailman_place_to_node : mailman_place -> node;
extern val mailman_place_to_ip : mailman_place -> ip;