extern void smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
extern void smtp_proxy_tls(uschar *, size_t, int *, int);
extern BOOL smtp_read_response(smtp_inblock *, uschar *, int, int, int);
+extern void smtp_reset(void *);
extern void smtp_respond(uschar *, int, BOOL, uschar *);
extern void smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
extern void smtp_port_for_connect(host_item *, int);