diff --git a/systems/x86_64-linux/prefect/services/mailserver/stalwart/default.nix b/systems/x86_64-linux/prefect/services/mailserver/stalwart/default.nix
index d842b53c..064a8097 100644
--- a/systems/x86_64-linux/prefect/services/mailserver/stalwart/default.nix
+++ b/systems/x86_64-linux/prefect/services/mailserver/stalwart/default.nix
@@ -94,6 +94,9 @@ in
       http = {
         url = "'https://${d.extUrl}'";
         hsts = true;
+        rate-limit = {
+          account = "10000/1m";
+        };
       };
       # Disable HTTP Forms submission
       # https://stalw.art/docs/http/form-submission