diff --git a/note.cron b/note.cron
index a54ad031..dc1f6460 100644
--- a/note.cron
+++ b/note.cron
@@ -9,6 +9,7 @@ MAILTO=notekfet2020@lists.crans.org
  *   *     *   *   *     root   cd /var/www/note_kfet && env/bin/python manage.py send_mail -c 1 -v 0
  *   *     *   *   *     root   cd /var/www/note_kfet && env/bin/python manage.py retry_deferred -c 1 -v 0
  00  0     *   *   *     root   cd /var/www/note_kfet && env/bin/python manage.py purge_mail_log 7 -v 0
+ 00  0     *   *   *     root   cd /var/www/note_kfet && env/bin/python manage.py purge_mail_log -r failure 30 -v 0
 # Faire une sauvegarde de la base de données
  00  2     *   *   *     root   cd /var/www/note_kfet && apps/scripts/shell/backup_db
 # Vérifier la cohérence de la base et mailer en cas de problème
diff --git a/note_kfet/settings/base.py b/note_kfet/settings/base.py
index eb0b013d..8378448d 100644
--- a/note_kfet/settings/base.py
+++ b/note_kfet/settings/base.py
@@ -225,6 +225,7 @@ MEDIA_URL = '/media/'
 # Use mailer in production to place emails in a queue before sending them to avoid spam
 EMAIL_BACKEND = 'mailer.backend.DbBackend'
 MAILER_EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
+MAILER_EMAIL_MAX_BATCH = 10
 EMAIL_USE_SSL = os.getenv('EMAIL_USE_SSL', False)
 EMAIL_HOST = os.getenv('EMAIL_HOST', 'smtp.example.org')
 EMAIL_PORT = os.getenv('EMAIL_PORT', 25)