Posted inmta postfix smtp

Compiling Postfix-2.7.0 As RPM Package

I used to have Simon J. Mudd when building postfix rpm package, but seems he’s not releasing official postfix 2.7.0 yet, here’s a way for impatient one

First make RedHat Linux the standard directory structure in our homedir

$ mkdir rpmbuild
$ mkdir -p rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS,tmp}

Create .rpmmacros file

$ vi .rpmmacros

%_topdir                %(echo $HOME)/rpmbuild
%_tmppath               %(echo $HOME)/rpmbuild/tmp

Create tempoerary working directory for postfix

$ mkdir postfix
$ cd postfix
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Posted inmta postfix smtp

Postfix Smtp Outgoing IP Rotator using iptables

This is the scheme

e.g:

I got 5 Public IPs. i’m Gonna configure them, so Postfix can use multiple interfaces/ips for outgoing smtp connections.

First we need creating Interface aliases for those 5 public IPs.

In my system, using fedora:

# cd /etc/sysconfig/network-scripts/
# cp ifcfg-eth0 ifcfg-eth0:1

Edit ifcfg-eth0:1

# vi ifcfg-eth0\:1

DEVICE=eth0 <-- default device
HWADDR=XX:XX:XX:XX:XX:XX
ONBOOT=yes
TYPE=Ethernet
BOOTPROTO=none
IPADDR=202.XXX.XX.2 <-- default eth0 IP address
PREFIX=24
GATEWAY=202.XXX.XX.1
DNS1=202.XXX.XX.XX

Change DEVICE and IPADDR parameters

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Posted inmta postfix tcp_table

Centos 5 Compile Postfix With Tcp Table Support

I've seen someone asking for postfix TCP_TABLE support on centos at mailing list.Actually that was easy to achieved.I'm gonna explain how to build postfix rpm package with TCP_TABLE support.There's great tutorial on how to build postfix RPM package maintain by Simon J Mudd.

I'm gonna used Simon J mud's postfix source RPM package to build the binary.

First download the latest postfix SRPM package 

$ rpm -Uvh postfix-2.6.5-1.src.rpm
$ cd `rpm --eval '%{_sourcedir}'`

$ export POSTFIX_SMTPD_MULTILINE_GREETING=1
$ export POSTFIX_LDAP=1
$ export POSTFIX_MYSQL_REDHAT=1
$ export POSTFIX_PCRE=1
$ export POSTFIX_PGSQL=1
$ export POSTFIX_RBL_MAPS=1
$ export POSTFIX_SASL=2
$ export POSTFIX_TLS=1
$ export POSTFIX_VDA=1
$ export POSTFIX_DB=4

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Posted inmta postfix smtp

Postfix smtp outgoing load balancing

I got good workaround for balancing smtp outgoing from postfix mailing list archives(not using expensive real load balancer). suppose we have 4 smtp servers for outgoing email, and we need to configure/load balance like this:

                                                         +------------+
                                                         |            |
                    +----------> smtp backend a -------->|            |
                    |                                    |            |
clients --------> smtp lb -----> smtp backend b -------->|  Intenet   |
                    |                                    |            |
                    +----------> smtp backend c -------->|            |
                                                         |            |
                                                         +------------+

Here’s the configuration :

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