diff --git a/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java b/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java
index 960dba4..05eac95 100644
--- a/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java
+++ b/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java
@@ -205,6 +205,7 @@ public class MessageController implements MessageApi {
         List<MessageTask.ReceivePerson> receivePersons = new ArrayList<>(requestReceivePersons);
         if (CollectionUtils.isNotEmpty(request.getImReceiveAccounts())) {
             for (String account : request.getImReceiveAccounts()) {
+                ensureImAccountNotBlank(account);
                 receivePersons.add(MessageTask.ReceivePerson.builder()
                         .imAccount(account)
                         .build());
@@ -255,6 +256,7 @@ public class MessageController implements MessageApi {
         List<MessageTask.ReceivePerson> receivePersons = new ArrayList<>(requestReceivePersons);
         if (CollectionUtils.isNotEmpty(request.getImReceiveAccounts())) {
             for (String account : request.getImReceiveAccounts()) {
+                ensureImAccountNotBlank(account);
                 receivePersons.add(MessageTask.ReceivePerson.builder()
                         .imAccount(account)
                         .build());
@@ -274,6 +276,11 @@ public class MessageController implements MessageApi {
         return ApiResult.ok(messageTask.getId());
     }
 
+    private void ensureImAccountNotBlank(String imAccount) {
+        BizAssertions.assertTrue(StringUtils.isNotBlank(imAccount), "接收人IM账号不能为空");
+        BizAssertions.assertFalse("null".equalsIgnoreCase(imAccount), "接收人IM账号不能为空");
+    }
+
     @Override
     public ApiResult<MessageUpdateResponse> updateMessage(UpdateMessageRequest request) {
         log.info("updateMessage, request={}", request);