/enums/business_message_provider.proto 

--- v25/enums/business_message_provider.proto   2026-10-09 20:58:00.000000000 +0000
+++ v26/enums/business_message_provider.proto   2026-10-09 20:58:06.000000000 +0000
@@ -45,5 +45,11 @@

     // Zalo message provider
     ZALO = 4;
+
+    // LINE message provider.
+    LINE = 5;
+
+    // SMS message provider.
+    SMS = 6;
   }
 }