I setup a mail server followed the instruction here: http://www.howtoforge.com/virtual-users-domains-postfix-mailscanner-mailwatch-centos5.1 So far everything seems fine. Lots spam mails has been catched. But in the maillog I see a lots errors: Code: Sep 24 15:19:06 zeta MailScanner: Clamd::ERROR:: UNKNOWN CLAMD RETURN ./razor-agent.log/Access denied. ERROR :: /var/spool/MailScanner/incoming/3229 How do I fix this error? Do I need manual install razor? Where is the razor-agent.log? Please help. Thanks.