diff --git a/CloudronManifest.json b/CloudronManifest.json
index bf87f9a..83a7c0c 100644
--- a/CloudronManifest.json
+++ b/CloudronManifest.json
@@ -23,7 +23,7 @@
     "localstorage": {},
     "postgresql": {},
     "redis": {},
-    "sendmail": {},
+    "sendmail": { "supportsDisplayName": false },
     "ldap": {}
   },
   "memoryLimit": 536870912,