--- ../../2.1/Mailman/Utils.py	2014-05-02 20:26:19.166274000 -0700
+++ Utils.py	2014-05-29 06:48:14.213492535 -0700
@@ -1070,7 +1070,11 @@
 # or possibly quarantine.
 def IsDMARCProhibited(mlist, email):
     if not dns_resolver:
-         return False
+        # This is a problem; log it.
+        syslog('error',
+            'DNS lookup for dmarc_moderation_action for list %s not available',
+            mlist)
+        return False
 
     email = email.lower()
     at_sign = email.find('@')