returntosender
(void) returntosender("Return receipt", rlist, RTSF_NO_BODY, e);
(void) returntosender(e->e_message, rlist,
if (returntosender(e->e_message, e->e_errorqueue,
if (returntosender(e->e_message, q, flags, e) == 0)
extern int returntosender __P((char *, ADDRESS *, int, ENVELOPE *));