diff --git a/gestion/gen_confs/adherents.py b/gestion/gen_confs/adherents.py
index 952b91d0..ff050f3f 100644
--- a/gestion/gen_confs/adherents.py
+++ b/gestion/gen_confs/adherents.py
@@ -164,7 +164,11 @@ class mail_bienvenue:
             try:
                 From = "respbats@crans.org"
                 To = mail
-                if To.find('@') == -1: To += '@crans.org'
+                if '@' not in To:
+                    if not os.path.exists("/home/" + To):
+                        continue
+                    else:
+                        To += '@crans.org'
                 conn=smtplib.SMTP('localhost')
                 conn.sendmail(From, To, config.txt_mail_bienvenue.encode('utf-8') % { 'From': From, 'To': To })
                 conn.quit()