void mailcom (void);
void write_mail (char *u);
void input_mail (char *x);
void read_mail (char *u);
void dump_headers (FILE *m);
void mail_menu (char *u);
void read_msg (int num);
void open_mail (char mode, Boolean complain);
void close_mail (char mode);
void delete_mail (void);
void check_files (void);