int smtp_connect(char *host, int port, int timeout);int smtp_sendmessage(int sd, char *AddrFrom, char **AddrTo, int AddrToCount,		char *AddrReply, char *subject, char *msg, char **AttachFiles,		int AttachCount, int timeout);int smtp_disconnect(int sd);int smtp_cmd(int sd, char *cmd, int success_code);int smtp_getreply(int sd);int smtp_sendfile(int sd, char *AddrFrom, char *AddrTo, char *filename);