diff --git a/src/NServiceBus.AcceptanceTests/BasicMessaging/When_using_a_greedy_convention.cs b/src/NServiceBus.AcceptanceTests/BasicMessaging/When_using_a_greedy_convention.cs
new file mode 100644
index 00000000000..c0320ddaf44
--- /dev/null
+++ b/src/NServiceBus.AcceptanceTests/BasicMessaging/When_using_a_greedy_convention.cs
@@ -0,0 +1,64 @@
+namespace NServiceBus.AcceptanceTests.BasicMessaging
+{
+    using System;
+    using EndpointTemplates;
+    using AcceptanceTesting;
+    using NUnit.Framework;
+    using ScenarioDescriptors;
+
+    public class When_using_a_greedy_convention : NServiceBusAcceptanceTest
+    {
+        [Test]
+        public void Should_receive_the_message()
+        {
+            Scenario.Define(() => new Context { Id = Guid.NewGuid() })
+                    .WithEndpoint<EndPoint>(b => b.Given((bus, context) => bus.SendLocal(new MyMessage
+                    {Id = context.Id})))
+                    .Done(c => c.WasCalled)
+                    .Repeat(r =>r
+                        .For(Transports.Msmq)
+                    )
+                    .Should(c => Assert.True(c.WasCalled, "The message handler should be called"))
+                    .Run();
+        }
+
+        public class Context : ScenarioContext
+        {
+            public bool WasCalled { get; set; }
+
+            public Guid Id { get; set; }
+        }
+
+        public class EndPoint : EndpointConfigurationBuilder
+        {
+            public EndPoint()
+            {
+                EndpointSetup<DefaultServer>(c => c.DefiningMessagesAs(MessageConvention));
+            }
+
+            static bool MessageConvention(Type t)
+            {
+                return t.Namespace != null && 
+                    (t.Namespace.EndsWith(".Messages") ||  (t == typeof(MyMessage)));
+            }
+        }
+
+        [Serializable]
+        public class MyMessage
+        {
+            public Guid Id { get; set; }
+        }
+
+        public class MyMessageHandler : IHandleMessages<MyMessage>
+        {
+            public Context Context { get; set; }
+            public void Handle(MyMessage message)
+            {
+                if (Context.Id != message.Id)
+                    return;
+
+                Context.WasCalled = true;
+            }
+        }
+    }
+}
diff --git a/src/NServiceBus.AcceptanceTests/NServiceBus.AcceptanceTests.csproj b/src/NServiceBus.AcceptanceTests/NServiceBus.AcceptanceTests.csproj
index add5476ccbc..f631b1ed95f 100644
--- a/src/NServiceBus.AcceptanceTests/NServiceBus.AcceptanceTests.csproj
+++ b/src/NServiceBus.AcceptanceTests/NServiceBus.AcceptanceTests.csproj
@@ -99,6 +99,7 @@
     <Reference Include="System.Xml.Linq" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="BasicMessaging\When_using_a_greedy_convention.cs" />
     <Compile Include="Audit\When_using_auditing_as_a_feature.cs" />
     <Compile Include="Audit\When_a_message_is_audited.cs" />
     <Compile Include="BasicMessaging\When_sending_a_message_with_no_correlation_id.cs" />
diff --git a/src/NServiceBus.Core.Tests/MessageConventionExtensionsTests.cs b/src/NServiceBus.Core.Tests/MessageConventionExtensionsTests.cs
index 9e0a59a107a..87d844a861e 100644
--- a/src/NServiceBus.Core.Tests/MessageConventionExtensionsTests.cs
+++ b/src/NServiceBus.Core.Tests/MessageConventionExtensionsTests.cs
@@ -1,6 +1,9 @@
-namespace NServiceBus.Core.Tests.Encryption
+namespace NServiceBus.Core.Tests
 {
     using System;
+    using System.Reflection;
+    using System.Reflection.Emit;
+    using Unicast.Messages;
     using NUnit.Framework;
 
     [TestFixture]
@@ -12,6 +15,7 @@ public void Should_use_TimeToBeReceived_from_bottom_of_tree()
             var timeToBeReceivedAction = MessageConventionExtensions.TimeToBeReceivedAction(typeof(InheritedClassWithAttribute));
             Assert.AreEqual(TimeSpan.FromSeconds(2), timeToBeReceivedAction);
         }
+
         [Test]
         public void Should_use_inherited_TimeToBeReceived()
         {
@@ -32,6 +36,38 @@ class InheritedClassWithNoAttribute : BaseClass
         {
             
         }
+
+
+        [Test]
+        public void Should_return_false_for_SN_and_non_particular_assembly()
+        {
+            Assert.IsFalse(MessageConventionExtensions.IsFromParticularAssembly(typeof(string)));
+        }
+
+        [Test]
+        public void Should_return_true_for_particular_assembly()
+        {
+            Assert.IsTrue(MessageConventionExtensions.IsFromParticularAssembly(typeof(ExecuteLogicalMessagesBehavior)));
+        }
+
+        [Test]
+        public void Should_return_false_for_non_SN_and_non_particular_assembly()
+        {
+            var type = GetNonSnFakeType();
+            Assert.IsFalse(MessageConventionExtensions.IsFromParticularAssembly(type));
+        }
+
+        static Type GetNonSnFakeType()
+        {
+            var assemblyName = new AssemblyName
+            {
+                Name = "myAssembly"
+            };
+            var assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.ReflectionOnly);
+            var newModule = assemblyBuilder.DefineDynamicModule("myModule");
+            var myType = newModule.DefineType("myType", TypeAttributes.Public);
+            return myType.CreateType();
+        }
     }
 
 }
\ No newline at end of file
diff --git a/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj b/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj
index a3a03b3aa30..81c29e53f97 100644
--- a/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj
+++ b/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj
@@ -13,6 +13,8 @@
     <FileAlignment>512</FileAlignment>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\NServiceBus.snk</AssemblyOriginatorKeyFile>
+    <AssemblyOriginatorKeyFile>Test.snk</AssemblyOriginatorKeyFile>
+    <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -310,6 +312,7 @@
       <SubType>Designer</SubType>
     </None>
     <None Include="ripple.dependencies.config" />
+    <None Include="Test.snk" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\NServiceBus.Core\NServiceBus.Core.csproj">
diff --git a/src/NServiceBus.Core.Tests/Test.snk b/src/NServiceBus.Core.Tests/Test.snk
new file mode 100644
index 00000000000..59da17bf7e1
Binary files /dev/null and b/src/NServiceBus.Core.Tests/Test.snk differ
diff --git a/src/NServiceBus.Core/InternalsVisibleTo.cs b/src/NServiceBus.Core/InternalsVisibleTo.cs
index 72629155ee0..b21f489ac3c 100644
--- a/src/NServiceBus.Core/InternalsVisibleTo.cs
+++ b/src/NServiceBus.Core/InternalsVisibleTo.cs
@@ -1,4 +1,4 @@
 using System.Runtime.CompilerServices;
 
 [assembly: InternalsVisibleTo("NServiceBus.Hosting.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100dde965e6172e019ac82c2639ffe494dd2e7dd16347c34762a05732b492e110f2e4e2e1b5ef2d85c848ccfb671ee20a47c8d1376276708dc30a90ff1121b647ba3b7259a6bc383b2034938ef0e275b58b920375ac605076178123693c6c4f1331661a62eba28c249386855637780e3ff5f23a6d854700eaa6803ef48907513b92")]
-[assembly: InternalsVisibleTo("NServiceBus.Core.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100dde965e6172e019ac82c2639ffe494dd2e7dd16347c34762a05732b492e110f2e4e2e1b5ef2d85c848ccfb671ee20a47c8d1376276708dc30a90ff1121b647ba3b7259a6bc383b2034938ef0e275b58b920375ac605076178123693c6c4f1331661a62eba28c249386855637780e3ff5f23a6d854700eaa6803ef48907513b92")]
\ No newline at end of file
+[assembly: InternalsVisibleTo("NServiceBus.Core.Tests, PublicKey=00240000048000009400000006020000002400005253413100040000010001007f16e21368ff041183fab592d9e8ed37e7be355e93323147a1d29983d6e591b04282e4da0c9e18bd901e112c0033925eb7d7872c2f1706655891c5c9d57297994f707d16ee9a8f40d978f064ee1ffc73c0db3f4712691b23bf596f75130f4ec978cf78757ec034625a5f27e6bb50c618931ea49f6f628fd74271c32959efb1c5")]
\ No newline at end of file
diff --git a/src/NServiceBus/MessageConventionExtensions.cs b/src/NServiceBus/MessageConventionExtensions.cs
index 89226bcbff5..67afad48e43 100644
--- a/src/NServiceBus/MessageConventionExtensions.cs
+++ b/src/NServiceBus/MessageConventionExtensions.cs
@@ -11,6 +11,21 @@
     /// </summary>
     public static class MessageConventionExtensions
     {
+        static byte[] nsbPublicKeyToken;
+
+        static MessageConventionExtensions()
+        {
+            var currentAssemblyName = typeof(MessageConventionExtensions).Assembly.GetName();
+            nsbPublicKeyToken = currentAssemblyName.GetPublicKeyToken();
+        }
+
+        internal static bool IsFromParticularAssembly(Type type)
+        {
+            return type.Assembly.GetName()
+                .GetPublicKeyToken()
+                .SequenceEqual(nsbPublicKeyToken);
+        }
+
         /// <summary>
         /// Returns true if the given object is a message.
         /// </summary>
@@ -27,10 +42,20 @@ public static bool IsMessageType(Type t)
             try
             {
                 return MessagesConventionCache.ApplyConvention(t,
-                                                               type => IsMessageTypeAction(type) ||
-                                                                       IsCommandTypeAction(type) ||
-                                                                       IsEventTypeAction(type) ||
-                                                                       IsInSystemConventionList(type));
+                                                               type =>
+                                                               {
+                                                                   if (IsInSystemConventionList(type))
+                                                                   {
+                                                                       return true;
+                                                                   }
+                                                                   if (IsFromParticularAssembly(type))
+                                                                   {
+                                                                       return false;
+                                                                   }
+                                                                   return IsMessageTypeAction(type) ||
+                                                                          IsCommandTypeAction(type) ||
+                                                                          IsEventTypeAction(type);
+                                                               });
             }
             catch (Exception ex)
             {
@@ -73,7 +98,14 @@ public static bool IsCommandType(Type t)
         {
             try
             {
-                return CommandsConventionCache.ApplyConvention(t, type => IsCommandTypeAction(type));
+                return CommandsConventionCache.ApplyConvention(t, type =>
+                {
+                    if (IsFromParticularAssembly(type))
+                    {
+                        return false;
+                    }
+                    return IsCommandTypeAction(type);
+                });
             }
             catch (Exception ex)
             {
@@ -96,7 +128,14 @@ public static bool IsExpressMessageType(Type t)
         {
             try
             {
-                return ExpressConventionCache.ApplyConvention(t, type => IsExpressMessageAction(type));
+                return ExpressConventionCache.ApplyConvention(t, type =>
+                {
+                    if (IsFromParticularAssembly(type))
+                    {
+                        return false;
+                    }
+                    return IsExpressMessageAction(type);
+                });
             }
             catch (Exception ex)
             {
@@ -151,7 +190,14 @@ public static bool IsEventType(Type t)
         {
             try
             {
-                return EventsConventionCache.ApplyConvention(t, type => IsEventTypeAction(type));
+                return EventsConventionCache.ApplyConvention(t, type =>
+                {
+                    if (IsFromParticularAssembly(type))
+                    {
+                        return false;
+                    }
+                    return IsEventTypeAction(type);
+                });
             }
             catch (Exception ex)
             {
diff --git a/src/NServiceBus/NServiceBus.csproj b/src/NServiceBus/NServiceBus.csproj
index 9bc5821f71b..e527908b88d 100644
--- a/src/NServiceBus/NServiceBus.csproj
+++ b/src/NServiceBus/NServiceBus.csproj
@@ -55,6 +55,9 @@
     <Reference Include="System.Core" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="..\NServiceBus.Core\InternalsVisibleTo.cs">
+      <Link>InternalsVisibleTo.cs</Link>
+    </Compile>
     <Compile Include="Address.cs" />
     <Compile Include="AddressMode.cs" />
     <Compile Include="CompletionResult.cs" />