diff --git a/mail-server.nix b/mail-server.nix
index e21a806..9b3d209 100644
--- a/mail-server.nix
+++ b/mail-server.nix
@@ -41,6 +41,28 @@ in {
       default = [ ];
     };
 
+    blacklist = {
+      senders = mkOption {
+        type = listOf str;
+        description =
+          "List of email addresses for which we will never send email.";
+        default = [ ];
+      };
+
+      recipients = mkOption {
+        type = listOf str;
+        description =
+          "List of email addresses for which we will not accept email.";
+        default = [ ];
+      };
+
+      dns = mkOption {
+        type = listOf str;
+        description = "List of DNS spam blacklists to use.";
+        default = [ ];
+      };
+    };
+
     aliases = {
       user-aliases = mkOption {
         type = attrsOf (listOf str);
diff --git a/postfix.nix b/postfix.nix
index 7c47d31..7082ee5 100644
--- a/postfix.nix
+++ b/postfix.nix
@@ -247,7 +247,7 @@ in {
         enableSubmission = true;
         # useSrs = true;
 
-        dnsBlacklists = cfg.blacklist.dns;
+        # dnsBlacklists = cfg.blacklist.dns;
 
         mapFiles = let
           writeEntries = filename: entries: