diff --git a/mozilla/mailnews/base/public/nsIMsgHdr.idl b/mozilla/mailnews/base/public/nsIMsgHdr.idl
index bb1ed9f3464..867ae790454 100644
--- a/mozilla/mailnews/base/public/nsIMsgHdr.idl
+++ b/mozilla/mailnews/base/public/nsIMsgHdr.idl
@@ -1,3 +1,80 @@
-interface nsIMsgHdr {};
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
 
-interface nsIMsgDBHdr {};
\ No newline at end of file
+#include "nsISupports.idl"
+#include "MailNewsTypes.idl"
+
+[ptr] native nsString(nsString);
+[ptr] native nsString2(nsString2);
+
+%{C++
+class nsString;
+class nsString2;
+%} 
+
+[scriptable, uuid(4e994f60-c317-11d2-8cc9-0060b0fc14a3)]
+interface nsIMsgHdr : nsISupports
+{
+  nsString GetProperty(in string propertyName);
+  void SetProperty(in string propertyName, in nsString propertyStr);
+
+  unsigned long GetUint32Property(in string propertyName);
+  void SetUint32Property(in string propertyName, in unsigned long propertyVal);
+
+  attribute unsigned short numReferences;
+  nsString2 GetStringReference(in long refNum);
+
+  attribute long long date;
+  attribute string messageId;
+  attribute string references;
+  attribute string CCList;
+  attribute string recipients;
+  attribute boolean recipientsIsNewsgroup;
+  attribute string author;
+
+  void SetRecipientsArray(in string names,
+                          in string addresses,
+                          in unsigned long numaddresses);
+
+  void SetCCListArray(in string names,
+                      in string addresses,
+                      in unsigned long numAddresses);
+
+  readonly attribute string mime2EncodedAuthor;
+  readonly attribute string mime2EncodedSubject;
+  readonly attribute string mime2EncodedRecipients;
+
+  readonly attribute string authorCollationKey;
+  readonly attribute string subjectCollationKey;
+  readonly attribute string recipientsCollationKey;
+
+  attribute string messageKey;
+  attribute nsMsgKey threadID;
+  attribute unsigned long messageSize;
+  attribute unsigned long lineCount;
+  attribute nsMsgPriority priority;
+  readonly attribute unsigned long messageOffset;
+  readonly attribute unsigned long statusOffset;
+  readonly attribute string charSet;
+  
+};
+
+interface nsIMsgDBHdr : nsIMsgHdr
+{
+
+};