diff --git a/objets.py b/objets.py
index d1ba3c2..e9c7115 100644
--- a/objets.py
+++ b/objets.py
@@ -951,6 +951,17 @@ class proprio(CransLdapObject):
             machine.delete(comm, login)
         super(proprio, self).delete(comm, login)
 
+    def get_mail(self):
+        """Renvoie un mail de contact valide, or None"""
+        mails = ( self.get('canonicalAlias', []) or \
+                  self.get('mail', []))
+        if not mails or \
+           any(b['type'] == 'mail_invalide' and b['fin'] == '-'
+              for b in self.get('blacklist', []) ):
+           return None
+        return mails[0].value
+
+
 class machine(CransLdapObject):
     u""" Une machine """
     can_be_by = { variables.created: [attributs.nounou, attributs.bureau, attributs.cableur, attributs.parent, attributs.respo],