diff --git a/src/policies/pubkey-ban-policy.ts b/src/policies/pubkey-ban-policy.ts
index 691a7ba..3fb68ba 100644
--- a/src/policies/pubkey-ban-policy.ts
+++ b/src/policies/pubkey-ban-policy.ts
@@ -1,8 +1,18 @@
 import { Policy } from '../types.ts';
 
-/** Ban individual pubkeys from publishing events to the relay. */
-const pubkeyPolicy: Policy<string[]> = ({ event: { id, pubkey } }, pubkeys = []) => {
-  const isMatch = pubkeys.includes(pubkey);
+/**
+ * Ban individual pubkeys from publishing events to the relay.
+ * Pass an array of pubkeys or an iterable, making it efficient to load pubkeys from a large file.
+ */
+const pubkeyBanPolicy: Policy<Iterable<string>> = ({ event: { id, pubkey } }, pubkeys = []) => {
+  let isMatch = false;
+
+  for (const p of pubkeys) {
+    if (p === pubkey) {
+      isMatch = true;
+      break;
+    }
+  }
 
   if (isMatch) {
     return {
@@ -19,4 +29,4 @@ const pubkeyPolicy: Policy<string[]> = ({ event: { id, pubkey } }, pubkeys = [])
   };
 };
 
-export default pubkeyPolicy;
+export default pubkeyBanPolicy;