diff --git a/django_mailbox/models.py b/django_mailbox/models.py
index 09b62fb..1b8f4ea 100644
--- a/django_mailbox/models.py
+++ b/django_mailbox/models.py
@@ -515,6 +515,7 @@ class Message(models.Model):
     eml = models.FileField(
         _(u'Raw message contents'),
         null=True,
+        blank=True,
         upload_to="messages",
         help_text=_(u'Original full content of message')
     )