setsender
setsender(owner, ee, NULL, '\0', true);
setsender(owner, e, NULL, '\0', true);
setsender(p, e, NULL, '\0', true);
setsender(from, &MainEnvelope, NULL, '\0', false);
setsender(argv[0], e, NULL, '\0', false);
setsender(sm_rpool_strdup_x(e->e_rpool, &bp[1]),
extern void setsender __P((char *, ENVELOPE *, char **, int, bool));
setsender(p, e, &delimptr, ' ', false);