diff --git a/postfix/defaults.yaml b/postfix/defaults.yaml
new file mode 100644
index 0000000..bbe615e
--- /dev/null
+++ b/postfix/defaults.yaml
@@ -0,0 +1,5 @@
+postfix:
+  package: postfix
+  service: postfix
+  aliases_file: /etc/aliases
+  config_dir: /etc/postfix
diff --git a/postfix/map.jinja b/postfix/map.jinja
index dc1df91..b044d5a 100644
--- a/postfix/map.jinja
+++ b/postfix/map.jinja
@@ -1,36 +1,12 @@
-{% set postfix = salt['grains.filter_by']({
-    'Debian': {
-        'package': 'postfix',
-        'policyd_spf_pkg': 'postfix-policyd-spf-python',
-        'postsrsd_pkg': 'postsrsd',
-        'postgrey_pkg': 'postgrey',
-        'pcre_pkg': 'postfix-pcre',
-        'mysql_pkg': 'postfix-mysql',
-        'service': 'postfix',
-        'aliases_file': '/etc/aliases',
-    },
-    'Gentoo': {
-        'package': 'mail-mta/postfix',
-        'policyd_spf_pkg': 'mail-filter/pypolicyd-spf',
-        'postsrsd_pkg': 'mail-filter/postsrsd',
-        'postgrey_pkg': 'mail-filter/postgrey',
-        'service': 'postfix',
-        'aliases_file': '/etc/mail/aliases',
-    },
-    'RedHat': {
-        'package': 'postfix',
-        'policyd_spf_pkg': 'pypolicyd-spf',
-        'postsrsd_pkg': 'postsrsd',
-        'postgrey_pkg': 'postgrey',
-        'service': 'postfix',
-        'aliases_file': '/etc/aliases',
-    },
-    'Arch' : {
-        'package': 'postfix',
-        'policyd_spf_pkg': 'python-postfix-policyd-spf',
-        'postsrsd_pkg': 'postsrsd',
-        'postgrey_pkg': 'postgrey',
-        'service': 'postfix',
-        'aliases_file': '/etc/aliases',
-    },
-}, merge=salt['pillar.get']('postfix:lookup')) %}
+{% import_yaml "postfix/defaults.yaml" as defaults %}
+{% import_yaml "postfix/osmap.yaml" as osmap %}
+
+{% set postfix = salt['grains.filter_by'](
+    defaults, 
+    merge=salt['grains.filter_by'](
+        osmap,
+        grain='os',
+        merge=salt['pillar.get']('postfix:lookup', {}),
+    ),
+    base='postfix')
+ %}
diff --git a/postfix/osmap.yaml b/postfix/osmap.yaml
new file mode 100644
index 0000000..d9d0ccf
--- /dev/null
+++ b/postfix/osmap.yaml
@@ -0,0 +1,24 @@
+Debian:
+  policyd_spf_pkg: postfix-policyd-spf-python
+  postsrsd_pkg: postsrsd
+  postgrey_pkg: postgrey
+  pcre_pkg: postfix-pcre
+  mysql_pkg: postfix-mysql
+
+Gentoo:
+  package: mail-mta/postfix
+  policyd_spf_pkg: mail-filter/pypolicyd-spf
+  postsrsd_pkg: mail-filter/postsrsd
+  postgrey_pkg: mail-filter/postgrey
+  aliases_file: /etc/mail/aliases
+
+RedHat:
+  policyd_spf_pkg: pypolicyd-spf
+  postsrsd_pkg: postsrsd
+  postgrey_pkg: postgrey
+
+Arch:
+  policyd_spf_pkg: python-postfix-policyd-spf
+  postsrsd_pkg: postsrsd
+  postgrey_pkg: postgrey
+