extern void smtpd_check_init(void);
extern int smtpd_check_addr(const char *);
extern char *smtpd_check_rewrite(SMTPD_STATE *);
extern char *smtpd_check_client(SMTPD_STATE *);
extern char *smtpd_check_helo(SMTPD_STATE *, char *);
extern char *smtpd_check_mail(SMTPD_STATE *, char *);
extern char *smtpd_check_size(SMTPD_STATE *, off_t);
extern char *smtpd_check_queue(SMTPD_STATE *);
extern char *smtpd_check_rcpt(SMTPD_STATE *, char *);
extern char *smtpd_check_etrn(SMTPD_STATE *, char *);
extern char *smtpd_check_data(SMTPD_STATE *);
extern char *smtpd_check_eod(SMTPD_STATE *);
extern char *smtpd_check_policy(SMTPD_STATE *, char *);