How to config auto mailbox ?

Hi , I have installed my own whois server and it working fine. But i can't update object via e-mail i just create account auto-dbm in my local account and in rip.config edit AUTOBOX to auto-dbm@localhost. AUTOBOX auto-dbm@localhost When i sent e-mail to this account , auto-dbm can get mail but nothing update. Please advice ,What should i do ? Regards , Chakapan. This e-mail protected by CAT Internet Antivirus