howto install postfix with mysql support on centos 5.3 from centosplus repo

install postfix from centosplus repo ONLY:

# edit: /etc/yum.repos.d/CentOS-Base.repo

...

[base]

exclude=postfix

...

[centosplus]

enabled=1

includepkgs=postfix

...

# yum remove postfix

# yum install postfix

verify with:

# yum list installed | grep postfix

postfix.x86_64 2:2.3.3-2.1.centos.mysql_pgsql installed

# postconf -m

btree

cidr

environ

hash

ldap

mysql

nis

pcre

pgsql

proxy

regexp

static

unix