Prepared by NOD32 Hong Kong
May 2004

Introduction

There are varies kinds of setup methods for Qmail, e.g. using amavisd, or dual qmail system, but it is difficult to config them.
Here we use an open source project qmail-amavisd integration, which forward emails to nod32smtp in qmail-queue. Both incoming and outgoing emails are scanned
You are required to compile qmail-smtp with QMAILQUEUE patch. Please refer to qmail for more information

Compile the program

Linux plaform

FreeBSD plaform

make

You can see there is an executable qmail-queue.smtp, replace the original qmail-queue with this, and create a new smtp service, for receiving emails from NOD32

mv /var/qmail/bin/qmail-queue /var/qmail/bin/qmail-queue-dr
cp qmail-queue.smtp /var/qmail/bin/qmail-queue
cp -a /var/qmail/supervise/qmail-smtpd /var/qmail/supervise/qmail-smtpd-nod32

Then change the listen port of qmail-smtpd-nod32 to 2525, here is an example of /var/qmail/supervise/qmail-smtpd-nod32/run. Change the path of tcp rules database too

#!/bin/sh
QMAILDUID=`id -u qmaild`
NOFILESGID=`id -g qmaild`
exec /usr/local/bin/softlimit -m 2000000 \
/usr/local/bin/tcpserver -H -R -v -p -x /etc/tcp.smtp.nod32.cdb \
-u $QMAILDUID -g $NOFILESGID 0 2525 /var/qmail/bin/qmail-smtpd 2>&1

Create a new file /etc/tcp.smtp.nod32

127.0.0.1:allow,RELAYCLIENT="",QMAILQUEUE="/var/qmail/bin/qmail-queue-dr"
:allow

Generate the new db

tcprules /etc/tcp.smtp.nod32.cdb /etc/tcp.smtp.nod32.tmp < /etc/tcp.smtp.nod32

Start your qmail-smtpd-nod32 by putting a symbolic in /services, or by your own means

ln -s /var/qmail/supervise/qmail-smtpd-nod32 /services/

start nod32smtp, and restart your qmail

chkconfig --level 35 nod32smtp on
service nod32smtp start

If you use qmailctl (redhat, suse etc) in init.d, you have to add the entries yourself