update..

roles/common/files/mailserver/etc/postfix/postfwd.wl-hosts

@@ -0,0 +1,22 @@
+# *** [ Ansible managed: DO NOT EDIT DIRECTLY ] ***
+
+# ---
+# Trusted hosts whitelisted by postfwd
+#
+#    This file is called with '=~'. This means perl regexp is possible
+#
+#
+# To increase performance use ^ and/or $ in regular expressions
+#
+# Example:
+#
+#  # all hosts of domain 'oopen.de'
+#  \.oopen\.de$
+#
+#  # host a.mx.oopen.de
+#  ^a\.mx\.oopen\.de$
+#
+# ---
+
+# give truested hostnames here
+