More Generic skipping of actual SMTP servers.

Added additional option for randomization of addresses returned via DNS lookup.

tasks/communication.yml

@@ -6,6 +6,7 @@
     line: "{{item.line}}"
     insertafter: EOF
   notify: Restart Postfix
+  when: "'SMTP0' not in inventory_hostname"
   with_items:
     - { dest: /etc/postfix/main.cf,
         regexp: "inet_protocols =",
@@ -19,7 +20,11 @@
         regexp: "relayhost =",
         line: "relayhost = {{ relayhost }}"
       }
-  when: "'SMTP' not in inventory_hostname"
+    - {
+        dest: /etc/postfix/main.cf,
+        regexp: "smtp_randomize_addresses =",
+        line: "smtp_randomize_addresses = no"
+      }
 
 - name: Ensure Postfix is Started/Enabled
   service: