diff --git a/welco/sources/mail/migrations/0011_mail_reference.py b/welco/sources/mail/migrations/0011_mail_reference.py
index 30bfd7d..96347aa 100644
--- a/welco/sources/mail/migrations/0011_mail_reference.py
+++ b/welco/sources/mail/migrations/0011_mail_reference.py
@@ -18,7 +18,7 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterModelOptions(
             name='mail',
-            options={'ordering': ['creation_timestamp', 'post_date'],
+            options={'ordering': ['post_date', 'creation_timestamp'],
                      'verbose_name': 'Mail'},
         ),
     ]
diff --git a/welco/sources/mail/models.py b/welco/sources/mail/models.py
index c5f0ef1..ec985e9 100644
--- a/welco/sources/mail/models.py
+++ b/welco/sources/mail/models.py
@@ -35,7 +35,7 @@ class Mail(models.Model):
 
     class Meta:
         verbose_name = _('Mail')
-        ordering = ['creation_timestamp', 'post_date']
+        ordering = ['post_date', 'creation_timestamp']
 
     content = models.FileField(_('Content'))
     post_date = models.DateField(_('Post Date'), null=True)