diff --git a/pykolab/imap/cyrus.py b/pykolab/imap/cyrus.py
--- a/pykolab/imap/cyrus.py
+++ b/pykolab/imap/cyrus.py
@@ -134,6 +134,10 @@
         """
         cyruslib.CYRUS.login(self, *args, **kw)
         self.separator = self.SEP
+        try:
+            self._id()
+        except Exception, errmsg:
+            pass
 
         log.debug(_("Continuing with separator: %r") % (self.separator), level=8)
         self.murder = False
@@ -216,6 +220,13 @@
         from pykolab import imap_utf7
         return imap_utf7.decode(folder)
 
+    def _id(self, identity=None):
+        if identity == None:
+            identity = "Python/Kolab %s"
+
+        typ, dat = self.m._simple_command('ID', identity)
+        res, dat = self.m._untagged_response(typ, dat, 'ID')
+
     def _setquota(self, mailfolder, quota):
         """
             Login to the actual backend server.