diff --git a/kmcommands.cpp b/kmcommands.cpp
index a14652134..2b1bbaed4 100644
--- a/kmcommands.cpp
+++ b/kmcommands.cpp
@@ -628,11 +628,15 @@ KMShowMsgSrcCommand::KMShowMsgSrcCommand( QWidget *parent,
   KMMessage *msg, bool fixedFont )
   :KMCommand( parent, msg ), mFixedFont( fixedFont )
 {
+  // remember complete state
+  mMsgWasComplete = msg->isComplete();
 }
 
 KMCommand::Result KMShowMsgSrcCommand::execute()
 {
   KMMessage *msg = retrievedMessage();
+  if ( msg->isComplete() && !mMsgWasComplete )
+    msg->notify(); // notify observers as msg was transfered
   QString str = msg->codec()->toUnicode( msg->asString() );
 
   MailSourceViewer *viewer = new MailSourceViewer(); // deletes itself upon close
diff --git a/kmcommands.h b/kmcommands.h
index 3876ee99e..350cb2135 100644
--- a/kmcommands.h
+++ b/kmcommands.h
@@ -291,6 +291,7 @@ public:
 
 private:
   bool mFixedFont;
+  bool mMsgWasComplete;
 };
 
 class KMSaveMsgCommand : public KMCommand