manage relay_domains file from pillar

pillar.example

@@ -9,6 +9,9 @@ postfix:
      - someuser_2@example.com
     singlealiasexample: 'someuser_3@example.com'
 
+  relay_domains:
+    example.com: 'OK'
+
   sasl_passwd:
     smtp.example.com: 'somepassword'
 

postfix/init.sls

@@ -56,6 +56,11 @@ run-newaliases:
 {{ postmap_file('virtual') }}
 {% endif %}
 
+# manage /etc/postfix/relay_domains if data found in pillar
+{% if 'relay_domains' in pillar.get('postfix', '') %}
+{{ postmap_file('relay_domains') }}
+{% endif %}
+
 # manage /etc/postfix/sasl_passwd if data found in pillar
 {% if 'sasl_passwd' in pillar.get('postfix', '') %}
 {{ postmap_file('sasl_passwd', 600) }}

postfix/relay_domains

@@ -0,0 +1,7 @@
+# Managed by config management
+{% set canonical = salt['pillar.get']('postfix:relay_domains',{}) -%}
+{% if canonical is iterable -%}
+{% for key,value in salt['pillar.get']('postfix:relay_domains',{}).iteritems() -%}
+{{ key }}  {{ value }}
+{% endfor %}
+{% endif %}