-int IsDirectory(char *addr);
-void CtdlDirectoryInit(void);
-void CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr);
-void CtdlDirectoryDelUser(char *internet_addr);
-int CtdlDirectoryLookup(char *target, char *internet_addr);
-
-int convert_internet_address(char *destuser, char *desthost, char *source);
-enum {
- rfc822_address_locally_validated,
- rfc822_no_such_user,
- rfc822_address_on_citadel_network,
- rfc822_address_nonlocal,
- rfc822_room_delivery
-};
+void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name);
+char *rfc822_fetch_field(const char *rfc822, const char *fieldname);
+void sanitize_truncated_recipient(char *str);
+char *qp_encode_email_addrs(char *source);
+int alias (char *name);