Добавден интерфейс можели письма

SecuritySystem/SecuritySystemDataModels/Models/IMessageInfoModel.cs

@@ -0,0 +1,12 @@
+namespace SecuritySystemDataModels.Models
+{
+    public interface IMessageInfoModel
+    {
+        string MessageId { get; }
+        int? ClientId { get; }
+        string SenderName { get; }
+        DateTime DateDelivery { get; }
+        string Subject { get; }
+        string Body { get; }
+    }
+}