diff --git a/application/src/test/java/org/thingsboard/server/controller/BaseAdminControllerTest.java b/application/src/test/java/org/thingsboard/server/controller/BaseAdminControllerTest.java
index 43b8f6caf1..61fa5bd526 100644
--- a/application/src/test/java/org/thingsboard/server/controller/BaseAdminControllerTest.java
+++ b/application/src/test/java/org/thingsboard/server/controller/BaseAdminControllerTest.java
@@ -92,19 +92,7 @@ public abstract class BaseAdminControllerTest extends AbstractControllerTest {
         .andExpect(status().isBadRequest())
         .andExpect(statusReason(containsString("is prohibited")));
     }
-    
-    @Test
-    public void testSaveAdminSettingsWithNewJsonStructure() throws Exception {
-        loginSysAdmin();
-        AdminSettings adminSettings = doGet("/api/admin/settings/mail", AdminSettings.class); 
-        JsonNode json = adminSettings.getJsonValue();
-        ((ObjectNode) json).put("newKey", "my new value");
-        adminSettings.setJsonValue(json);
-        doPost("/api/admin/settings", adminSettings)
-        .andExpect(status().isBadRequest())
-        .andExpect(statusReason(containsString("Provided json structure is different")));
-    }
-    
+
     @Test
     public void testSendTestMail() throws Exception {
         loginSysAdmin();
diff --git a/dao/src/main/java/org/thingsboard/server/dao/settings/AdminSettingsServiceImpl.java b/dao/src/main/java/org/thingsboard/server/dao/settings/AdminSettingsServiceImpl.java
index a016d02d73..6c7495cc19 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/settings/AdminSettingsServiceImpl.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/settings/AdminSettingsServiceImpl.java
@@ -73,9 +73,6 @@ public class AdminSettingsServiceImpl implements AdminSettingsService {
                         if (!existentAdminSettings.getKey().equals(adminSettings.getKey())) {
                             throw new DataValidationException("Changing key of admin settings entry is prohibited!");
                         }
-                        if (adminSettings.getKey().equals("mail")) {
-                            validateJsonStructure(existentAdminSettings.getJsonValue(), adminSettings.getJsonValue());
-                        }
                     }
                 }
 
diff --git a/dao/src/test/java/org/thingsboard/server/dao/service/BaseAdminSettingsServiceTest.java b/dao/src/test/java/org/thingsboard/server/dao/service/BaseAdminSettingsServiceTest.java
index 71aaedef2c..9d5f391dc1 100644
--- a/dao/src/test/java/org/thingsboard/server/dao/service/BaseAdminSettingsServiceTest.java
+++ b/dao/src/test/java/org/thingsboard/server/dao/service/BaseAdminSettingsServiceTest.java
@@ -67,13 +67,4 @@ public abstract class BaseAdminSettingsServiceTest extends AbstractServiceTest {
         adminSettings.setKey("newKey");
         adminSettingsService.saveAdminSettings(SYSTEM_TENANT_ID, adminSettings);
     }
-    
-    @Test(expected = DataValidationException.class)
-    public void testSaveAdminSettingsWithNewJsonStructure() {
-        AdminSettings adminSettings = adminSettingsService.findAdminSettingsByKey(SYSTEM_TENANT_ID, "mail");
-        JsonNode json = adminSettings.getJsonValue();
-        ((ObjectNode) json).put("newKey", "my new value");
-        adminSettings.setJsonValue(json);
-        adminSettingsService.saveAdminSettings(SYSTEM_TENANT_ID, adminSettings);
-    }
 }