qmail installation from Source Code in Centos 5.5

# mkdir /root/qmail
# cd /root/qmail
# wget http://www.qmail.org/netqmail-1.06.tar.gz
# wget http://cr.yp.to/ucspi-tcp/ucspi-tcp-0.88.tar.gz --> inetd/xinetd substitute manages various daemon that qmail shipped with.
# wget http://cr.yp.to/daemontools/daemontools-0.76.tar.gz --> Provide some services such as management as well as logging though 2 interfaces service scan and supervise (svscan/supervise).

# tar -xvzf netqmail-1.06.tar.gz
# tar -xvzf ucspi-tcp-0.88.tar.gz
# mkdir /package
# mv daemontools-0.76.tar.gz /package
# mkdir /var/qmail
# cd /root/qmail/netqmail-1.06
# cp INSTALL.ids IDS --> This file used in compilation to create users and groups for qmail

 Note:- IDS file should include only the following
   groupadd nofiles                    
   useradd -g nofiles -d /var/qmail/alias alias  
   useradd -g nofiles -d /var/qmail qmaild        
   useradd -g nofiles -d /var/qmail qmaill       
   useradd -g nofiles -d /var/qmail qmailp       
   groupadd qmail                    
   useradd -g qmail -d /var/qmail qmailq        
   useradd -g qmail -d /var/qmail qmmailr        
   useradd -g qmail -d /var/qmail qmails        


# . IDS && echo $? --> To source the file in order to execute it and echo the exist status
# yum install gcc gcc-c++ make flex bison bison-devel
# make setup check --> To build source files
# ./config-fast mail.linux.org (FQDN) --> If the FQDN is not defined you can check it using hostname -f
# cd /root/qmail/ucspi-tcp-0.88
# yum install patch-2.5.4-31.el5 --> Make sure that the patch command is installed
# patch < /root/qmail/netqmail-1.06/other-patches/ucspi-tcp-0.88.errno.patch --> this will pactch ucspi patch to the environment
# make && make setup check
# cd /package
# tar -xvzf daemontools-0.76.tar.gz
# cd /package/admin/daemontools-0.76/src
# patch < /root/qmail/netqmail-1.06/other-patches/daemontools-0.76.errno.patch
# cd ..
# package/install
# vim /var/qmail/rc --> And add the following

#!/bin/sh

# Using stdout for logging
# Using control/defaultdelivery from qmail-local to deliver messages by default
exec env - PATH="/var/qmail/bin:$PATH" \
qmail-start "`cat /var/qmail/control/defaultdelivery`"

# chmod 755 /var/qmail/rc
# mkdir /var/log/qmail
# echo "./Mailbox" > /var/qmail/control/defaultdelivery

The qmailctl script

# wget http://lifewithqmail.org/qmailctl-script-dt70
# mv qmailctl-script-dt70 /var/qmail/bin/qmailctl
# chmod 755 /var/qmail/bin/qmailctl
# ln -s /var/qmail/bin/qmailctl /usr/bin

The supervise scripts

# mkdir -p /var/qmail/supervise/qmail-send/log
# mkdir -p /var/qmail/supervise/qmail-smtpd/log
# vim /var/qmail/supervise/qmail-send/run --> Add the following

#!/bin/sh
exec /var/qmail/rc

# vim /var/qmail/supervise/qmail-send/log/run --> Add the following

#!/bin/sh
exec /usr/local/bin/setuidgid qmaill /usr/local/bin/multilog t /var/log/qmail

# vim /var/qmail/supervise/qmail-smtpd/run --> Add the following

#!/bin/sh

QMAILDUID=`id -u qmaild`
NOFILESGID=`id -g qmaild`
MAXSMTPD=`cat /var/qmail/control/concurrencyincoming`
LOCAL=`head -1 /var/qmail/control/me`

if [ -z "$QMAILDUID" -o -z "$NOFILESGID" -o -z "$MAXSMTPD" -o -z "$LOCAL" ]; then
    echo QMAILDUID, NOFILESGID, MAXSMTPD, or LOCAL is unset in
    echo /var/qmail/supervise/qmail-smtpd/run
    exit 1
fi

if [ ! -f /var/qmail/control/rcpthosts ]; then
    echo "No /var/qmail/control/rcpthosts!"
    echo "Refusing to start SMTP listener because it'll create an open relay"
    exit 1
fi

exec /usr/local/bin/softlimit -m 2000000 \
    /usr/local/bin/tcpserver -v -R -l "$LOCAL" -x /etc/tcp.smtp.cdb -c "$MAXSMTPD" \
        -u "$QMAILDUID" -g "$NOFILESGID" 0 smtp /var/qmail/bin/qmail-smtpd 2>&1

Note: concurrencyincoming isn't a standard qmail control file. It's a feature of the above script. Also, that's -1 (dash one) on the LOCAL line and -l (dash ell) on the tcpserver line.

Note: The memory limit specified in the softlimit command may need to be raised depending upon your operating system and hardware platform. If attempts to connect to port 25 fail or remote systems are unable to send you mail, or you see a message like:

/usr/local/bin/tcpserver: error while loading shared libraries:
libc.so.6: failed to map segment from shared object: Cannot allocate memory try raising it to 3000000 or 4000000.

# echo 20 > /var/qmail/control/concurrencyincoming
# chmod 644 /var/qmail/control/concurrencyincoming
# vim /var/qmail/supervise/qmail-smtpd/log/run --> Add the following

#!/bin/sh
exec /usr/local/bin/setuidgid qmaill /usr/local/bin/multilog t /var/log/qmail/smtpd

# chmod 755 /var/qmail/supervise/qmail-send/run
# chmod 755 /var/qmail/supervise/qmail-send/log/run
# chmod 755 /var/qmail/supervise/qmail-smtpd/run
# chmod 755 /var/qmail/supervise/qmail-smtpd/log/run

# mkdir -p /var/log/qmail/smtpd
# chown qmaill /var/log/qmail /var/log/qmail/smtpd
# rm -rf /usr/sbin/sendmail   
# ln -s /var/qmail/bin/sendmail /usr/sbin
# rm -rf /usr/lib/sendmail
# ln -s /var/qmail/bin/sendmail /usr/lib
# echo  root > /var/qmail/alias/.qmail-root
# echo  root > /var/qmail/alias/.qmail-postmaster
# ln -s var/qmail/alias/.qmail-postmaster /var/qmail/alias/.qmail-mailer-daemon
# chmod 644 /var/qmail/alias/.qmail-root /var/qmail/alias/.qmail-postmaster
# echo '127.:allow,RELAYCLIENT=""' >>/etc/tcp.smtp
# qmailctl cdb
# ln -s /var/qmail/supervise/qmail-send /var/qmail/supervise/qmail-smtpd /service