hello, I was trying to build a new anti-spam gateway that is supposed to be in front of the two existing one. I followed exactly this howto: http://www.howtoforge.com/assp_clamav_postfix_debian_etch But I'm getting the following error when trying to send me an email by connecting directly on my new smtp gateway: telnet ptitux 25 ehlo localhost mail from:<email@example.com> rcpt to:<firstname.lastname@example.org>: Recipient address rejected: User unknown in virtual mailbox table And that is the point! I do not have any virtual box and I dont want to have some beacause this is just an smtp gateway. I put in the transport table the following rule mycompany.com smtp:[192.168.201.118] 192.168.201.118 is the ip of the current front smtp gateway that should become the scond one this is what I have in /var/log/mail.log: Code: Sep 9 12:26:22 ptitux postfix/smtpd: warning: 172.25.100.8: hostname box.kremlin.mycompany.com verification failed: Name or service not known Sep 9 12:26:22 ptitux postfix/smtpd: connect from unknown[172.25.100.8] Sep 9 12:26:42 ptitux postfix/smtpd: NOQUEUE: reject: RCPT from unknown[172.25.100.8]: 550 5.1.1 <email@example.com>: Recipient address rejected: User unknown in virtual mailbox table; from=<firstname.lastname@example.org> to=<email@example.com> proto=ESMTP helo=<localhost> ptitux has ip: 172.25.100.8 Any Idea or help would be appreciated! Thanks a lot!