diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ebcce7..4811816 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ## [Unreleased]
 
+### Breaked
+
+- use new variable postfix_config
+
 ### Added
 
 - feat: add bsd-mailx package
diff --git a/README.md b/README.md
index c052e33..46c69bd 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # Ansible role: Postfix MTA
+
 [![Version](https://img.shields.io/badge/latest_version-1.0.0-green.svg)](https://git.yaegashi.fr/nishiki/ansible-role-postfix_mta/releases)
 [![License](https://img.shields.io/badge/license-Apache--2.0-blue.svg)](https://git.yaegashi.fr/nishiki/ansible-role-postfix_mta/src/branch/master/LICENSE)
 
@@ -11,10 +12,24 @@ Install and configure an simple mta with postfix
 
 ## Role variables
 
+* `postfix_config` - hash with config
 
-* `postfix_hostname` - the server hostname (default: `ansible_fqdn`)
-* `postfix_origin` - the domain to send mail (default: `$myhostname`)
-* `postfix_protocols` - protocols to listen (default: `all`)
+```
+  smtpd_banner: $myhostname ESMTP $mail_name (Debian/GNU)
+  biff: 'no'
+  append_dot_mydomain: 'no'
+  readme_directory: 'no'
+  compatibility_level: 2
+  myhostname: '{{ ansible_fqdn }}'
+  myorigin: $myhostname
+  mydestination: $myhostname, localhost
+  default_transport: smtp
+  mynetworks: 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
+  mailbox_size_limit: '0'
+  recipient_delimiter: '+'
+  inet_interfaces: localhost
+  inet_protocols: all
+```
 
 ## How to use
 
@@ -25,6 +40,7 @@ Install and configure an simple mta with postfix
 ```
 
 ## Development
+
 ### Test syntax with yamllint
 
 * install `python` and `python-pip`
diff --git a/defaults/main.yml b/defaults/main.yml
index beae9c6..823fe30 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -1,4 +1,20 @@
 ---
 postfix_hostname: '{{ ansible_fqdn }}'
 postfix_origin: '$myhostname'
-postfix_protocols: all
+postfix_config: {}
+postfix_default_config:
+  smtpd_banner: $myhostname ESMTP $mail_name (Debian/GNU)
+  biff: 'no'
+  append_dot_mydomain: 'no'
+  readme_directory: 'no'
+  compatibility_level: 2
+  myhostname: '{{ ansible_fqdn }}'
+  myorigin: $myhostname
+  mydestination: $myhostname, localhost
+  default_transport: smtp
+  mynetworks: 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
+  mailbox_size_limit: '0'
+  recipient_delimiter: '+'
+  inet_interfaces: localhost
+  inet_protocols: all
+postfix_full_config: '{{ postfix_default_config|combine(postfix_config) }}'
diff --git a/templates/main.cf.j2 b/templates/main.cf.j2
index 521c56d..724c767 100644
--- a/templates/main.cf.j2
+++ b/templates/main.cf.j2
@@ -1,16 +1,5 @@
 # {{ ansible_managed }}
 
-smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
-biff = no
-append_dot_mydomain = no
-readme_directory = no
-compatibility_level = 2
-myhostname = {{ postfix_hostname }}
-myorigin = {{ postfix_origin }}
-mydestination = $myhostname, localhost
-default_transport = smtp
-mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
-mailbox_size_limit = 0
-recipient_delimiter = +
-inet_interfaces = localhost
-inet_protocols = {{ postfix_protocols }}
+{% for option, value in postfix_full_config.items() %}
+{{ option }} = {{ value }}
+{% endfor %}