diff --git a/modules/dnsbl/__init__.py b/modules/dnsbl/__init__.py
index 2c3fa36d..69bb189f 100644
--- a/modules/dnsbl/__init__.py
+++ b/modules/dnsbl/__init__.py
@@ -42,7 +42,8 @@ class Module(ModuleManager.BaseModule):
         for list in lists:
             record = self._check_list(list.hostname, address)
             if not record == None:
-                failed.append((list.hostname, list.process(record)))
+                reason = list.process(record) or "unknown"
+                failed.append((list.hostname, reason))
         return failed
 
     def _check_list(self, list, address):
diff --git a/modules/dnsbl/lists.py b/modules/dnsbl/lists.py
index 0ae6a1b6..ce2b6404 100644
--- a/modules/dnsbl/lists.py
+++ b/modules/dnsbl/lists.py
@@ -18,21 +18,32 @@ class ZenSpamhaus(DNSBL):
             return "exploits"
 class EFNetRBL(DNSBL):
     hostname = "rbl.efnetrbl.org"
-    SPAMTRAP = ["2", "3"]
     def process(self, result):
         result = result.rsplit(".", 1)[1]
         if result == "1":
             return "proxy"
-        elif result in self.SPAMTRAP:
+        elif result in ["2", "3"]:
             return "spamtap"
         elif result == "4":
             return "tor"
         elif result == "5":
             return "flooding"
 
+class DroneBL(DNSBL):
+    hostname = "dnsbl.dronebl.org"
+    def process(self, result):
+        result = result.rsplit(".", 1)[1]
+        if result in ["8", "9", "10", "11", "14"]:
+            return "proxy"
+        elif result in ["3", "6", "7"]:
+            return "flooding"
+        elif result in ["12", "13", "15", "16"]:
+            return "exploits"
+
 DEFAULT_LISTS = [
     ZenSpamhaus(),
-    EFNetRBL()
+    EFNetRBL(),
+    DroneBL()
 ]
 
 def default_lists():