Mantis#1658. Thank you, Melanie for a patch that:

Adds IEmailModule and a module skelaton

OpenSim/Region/Environment/Modules/Scripting/EMailModules/EmailModule.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Reflection;
+using System.Collections.Generic;
+using libsecondlife;
+using OpenSim.Framework;
+using OpenSim.Region.Environment.Interfaces;
+using OpenSim.Region.Environment.Scenes;
+using log4net;
+using Nini.Config;
+
+namespace OpenSim.Region.Environment.Modules.Scripting.EmailModules
+{
+    public class EmailModule : IEmailModule
+    {
+        //
+        // Log
+        //
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        //
+        // Module vars
+        //
+        private IConfigSource m_Config;
+
+        // Scenes by Region Handle
+        private Dictionary<ulong, Scene> m_Scenes =
+                new Dictionary<ulong, Scene>();
+
+		private bool m_Enabled = false;
+
+        public void Initialise(Scene scene, IConfigSource config)
+        {
+            m_Config = config;
+
+            IConfig startupConfig = m_Config.Configs["Startup"];
+
+			m_Enabled = (startupConfig.GetString("emailmodule",
+					"DefaultEmailModule") == "DefaultEmailModule");
+
+            // It's a go!
+            if (m_Enabled)
+            {
+                lock (m_Scenes)
+                {
+                    // Claim the interface slot
+                    scene.RegisterModuleInterface<IEmailModule>(this);
+
+                    // Add to scene list
+                    if (m_Scenes.ContainsKey(scene.RegionInfo.RegionHandle))
+                    {
+                        m_Scenes[scene.RegionInfo.RegionHandle] = scene;
+                    }
+                    else
+                    {
+                        m_Scenes.Add(scene.RegionInfo.RegionHandle, scene);
+                    }
+                }
+
+                m_log.Info("[EMAIL] Activated DefaultEmailModule");
+            }
+        }
+
+        public void PostInitialise()
+        {
+        }
+
+        public void Close()
+        {
+        }
+
+        public string Name
+        {
+            get { return "DefaultEmailModule"; }
+        }
+
+        public bool IsSharedModule
+        {
+            get { return true; }
+        }
+
+        public void SendEmail(LLUUID objectID, string address, string subject, string body)
+		{
+		}
+
+		public Email GetNextEmail(LLUUID objectID, string sender, string subject)
+		{
+			return null;
+		}
+	}
+}