diff --git a/gestion/mail/installparty.py b/gestion/mail/installparty.py
index f17219a2..eac4562d 100755
--- a/gestion/mail/installparty.py
+++ b/gestion/mail/installparty.py
@@ -21,13 +21,11 @@ ldap_filter=u'(&(|(droits=*)(&(!(chbre=EXT))(!(chbre=????))(chbre=*)(!(chbre=EXT
 conn=lc_ldap.shortcuts.lc_ldap_readonly()
 mailaddrs=set()
 for adh in conn.search(ldap_filter, sizelimit=2000):
-    # Déjà payé pour l'année en cours
-    if 'canonicalAlias' in adh.attrs.keys():
-        mailaddrs.add(str(adh['canonicalAlias'][0]))
-    elif 'mail' in adh.attrs.keys():
-        mailaddrs.add(str(adh['mail'][0]))
-    else:
-        raise ValueError("%r has nor mail nor canonicalAlias, only %s" % (adh, adh.attrs.keys()))
+    mailaddr = adh.get_mail()
+    if not mailaddr:
+        print "Skipping %r (no valid mail)" % adh
+        continue
+    mailaddrs.add(mailaddr)
 
 print "Va envoyer le message à %s personnes." % len(mailaddrs)
 if not SEND: