diff --git a/gestion/ldap_crans.py b/gestion/ldap_crans.py
index e2f47d96..8993559a 100755
--- a/gestion/ldap_crans.py
+++ b/gestion/ldap_crans.py
@@ -124,17 +124,17 @@ def mailexist(mail):
     du serveur mail
     """
 
+    mail = mail.split('@', 1)[0]
+
     try:
         s = smtplib.SMTP(smtpserv)
-        r = s.vrfy(mail)
+        s.putcmd("vrfy", mail)
+        r = s.getreply()[0] in [250, 252]
         s.close()
     except:
         raise ValueError(u'Serveur de mail injoignable')
 
-    if r[0] in [250, 252]:
-        return True
-    else:
-        return False
+    return r
 
 def preattr(val):
     """