separate postgrey into a separate module

postfix/map.jinja

@@ -1,18 +1,22 @@
 {% set postfix = salt['grains.filter_by']({
     'Debian': {
         'packages': ['postfix', 'postfix-policyd-spf-python'],
+        'postgrey_pkg': 'postgrey',
         'service': 'postfix',
     },
     'Gentoo': {
         'packages': ['mail-mta/postfix'],
+        'postgrey_pkg': 'postgrey',
         'service': 'postfix',
     },
     'RedHat': {
         'packages': ['postfix'],
+        'postgrey_pkg': 'postgrey',
         'service': 'postfix',
     },
     'Arch' : {
-        'packages': ['postfix', 'postgrey'],
+        'packages': ['postfix'],
+        'postgrey_pkg': 'postgrey',
         'service': 'postfix',
     },
 }, merge=salt['pillar.get']('postfix:lookup')) %}

postfix/postgrey.sls

@@ -0,0 +1,15 @@
+{% from "postfix/map.jinja" import postfix with context %}
+
+postgrey:
+  pkg.installed:
+    - name: {{ postfix.postgrey_pkg }}
+    - watch_in:
+      - service: postgrey
+
+  service.running:
+    - enable: True
+    - require:
+      - pkg: postgrey
+    - watch:
+      - pkg: postgrey
+