Configure Amavisd-new

Configure amavisd.conf

cd /usr/local/etc
cp amavisd.conf-default amavisd.conf
pico amavisd.conf

## edit or uncomment these line below :
$max_servers = 2;            # num of pre-forked children (2..30 is common), -m
$daemon_user  = 'vscan';     # (no default;  customary: vscan or amavis), -u
$daemon_group = 'vscan';     # (no default;  customary: vscan or amavis), -g

$mydomain = 'server.postfixrocks.org';   # a convenient default for other settings

@av_scanners = (

## uncomment these line below :
['ClamAV-clamd',
\&ask_daemon, ["CONTSCAN \n", "/var/run/clamav/clamd.sock"],
qr/\bOK$/, qr/\bFOUND$/,
qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],

## leave all default config untouch.

Debug amavisd

/usr/local/sbin/amavisd debug
.....
## you need to make sure 3 module loaded ##
/usr/local/sbin/amavisd[17650]: ANTI-VIRUS code      loaded
/usr/local/sbin/amavisd[17650]: ANTI-SPAM code       loaded
/usr/local/sbin/amavisd[17650]: ANTI-SPAM-SA code    loaded
.....

If everything goes well we can start amavisd without debug option.