====== Setup clamav with Postfix on Debian Lenny in a chroot ======

Quick and dirty instructions on setting up Postfix to scan messages using clamav on Debian Lenny.

Install clamav and clamav-milter:

<code>
apt-get install clamav
apt-get install clamav-daemon
apt-get install clamav-milter
</code>

Edit /etc/default/clamav-milter and uncomment the following lines

<code>
USE_POSTFIX='yes'
SOCKET=local:/var/spool/postfix/clamav/clamav-milter.ctl
</code>
If you don't want the postmaster and sender to be emailed each time a virus is detected then add the letter q to the OPTIONS line at the beginning of the file as such:

<code>
OPTIONS="--max-children=2 -olq"
</code>
Create somewhere within the Postfix chroot for the clamav-milter socket to sit. The default location cannot be seen by Postfix when it is in a chroot jail.

<code>
mkdir -p /var/spool/postfix/clamav/
chown clamav:postfix /var/spool/postfix/clamav/
chmod g+s /var/spool/postfix/clamav/
</code>

Restart the milter:

<code>
/etc/init.d/clamav-milter restart
</code>

Add the following lines to /etc/postfix/main.cf to enable the milter (assumes you want to accept emails on milter failure):

<code>
milter_connect_macros = i b j _ {daemon_name} {if_name} {if_addr}
smtpd_milters = unix:/clamav/clamav-milter.ctl
milter_default_action = accept
</code>

Restart Postfix:

<code>
/etc/init.d/postfix restart
</code>