diff --git a/embedx/config.schema.json b/embedx/config.schema.json
index c22582d9737..b91298496c9 100644
--- a/embedx/config.schema.json
+++ b/embedx/config.schema.json
@@ -888,11 +888,7 @@
                 "base64://e3sgZGVmaW5lIGFmLVpBIH19CkhhbGxvLAoKSGVyc3RlbCBqb3UgcmVrZW5pbmcgZGV1ciBoaWVyZGllIHNrYWtlbCB0ZSB2b2xnOgp7ey0gZW5kIC19fQoKe3sgZGVmaW5lIGVuLVVTIH19CkhpLAoKcGxlYXNlIHJlY292ZXIgYWNjZXNzIHRvIHlvdXIgYWNjb3VudCBieSBjbGlja2luZyB0aGUgZm9sbG93aW5nIGxpbms6Cnt7LSBlbmQgLX19Cgp7ey0gaWYgZXEgLmxhbmcgImFmLVpBIiAtfX0KCnt7IHRlbXBsYXRlICJhZi1aQSIgLiB9fQoKe3stIGVsc2UgLX19Cgp7eyB0ZW1wbGF0ZSAiZW4tVVMiIH19Cgp7ey0gZW5kIC19fQo8YSBocmVmPSJ7eyAuUmVjb3ZlcnlVUkwgfX0iPnt7IC5SZWNvdmVyeVVSTCB9fTwvYT4"
               ]
             }
-          },
-          "required": [
-            "plaintext",
-            "html"
-          ]
+          }
         },
         "subject": {
           "type": "string",