diff --git a/zephyr/lib/actions.py b/zephyr/lib/actions.py
index 99748b39ff..21de751f4b 100644
--- a/zephyr/lib/actions.py
+++ b/zephyr/lib/actions.py
@@ -704,8 +704,11 @@ def do_create_realm(domain, restricted_to_domain=True):
                    "domain": domain,
                    "restricted_to_domain": restricted_to_domain})
 
+        signup_message = "Signups enabled"
+        if not restricted_to_domain:
+            signup_message += " (open realm)"
         internal_send_message("humbug+signups@humbughq.com", "stream",
-                              "signups", domain, "Signups enabled.")
+                              "signups", domain, signup_message)
     return (realm, created)
 
 def do_change_enable_desktop_notifications(user_profile, enable_desktop_notifications, log=True):