diff -r 16ed8d08d0b1 -r 478bc57ad291 emailuis/nmailuiengine/inc/nmdataplugininterface.h
--- a/emailuis/nmailuiengine/inc/nmdataplugininterface.h	Wed Aug 18 09:37:47 2010 +0300
+++ b/emailuis/nmailuiengine/inc/nmdataplugininterface.h	Thu Sep 02 20:15:00 2010 +0300
@@ -192,6 +192,8 @@
         const QList<quint64> &messageIds, 
         const NmId &sourceFolderId,
         const NmId &destinationFolderId) = 0;
+
+    virtual int getSignature(const NmId &mailboxId, QString *&signature) = 0;
 };
 
 Q_DECLARE_INTERFACE(NmDataPluginInterface, "sf.app.commonmail.emailuis.nmailuiengine.NmDataPluginInterface/1.0")