--- a/tcb.schema	Thu Oct 20 04:31:52 2005 +0000
+++ b/tcb.schema	Thu Oct 20 05:53:52 2005 +0000
@@ -31,6 +31,13 @@
 ####
 
 objectClass (
+    tcbObjectClass:2 NAME 'tcbMailAlias' DESC 'Alias'
+    SUP top
+    STRUCTURAL
+    MUST ( mail )
+    MAY ( tcbMailForwardingAddress $ description ) )
+
+objectClass (
     tcbObjectClass:3 NAME 'tcbMailRecipient' DESC 'mail attributes associated to person'
     SUP top
     AUXILIARY