diff --git a/django_mailbox/models.py b/django_mailbox/models.py
index 16c11f9..e604caa 100644
--- a/django_mailbox/models.py
+++ b/django_mailbox/models.py
@@ -183,7 +183,12 @@ class Mailbox(models.Model):
         msg = self._process_message(message)
         msg.outgoing = False
         msg.save()
-        message_received.send(sender=self, message=msg)
+
+        try:
+            message_received.send(sender=self, message=msg)
+        except:
+            pass
+
         return msg
 
     def record_outgoing_message(self, message):
diff --git a/django_mailbox/transports/imap.py b/django_mailbox/transports/imap.py
index 6317857..2ba3db2 100644
--- a/django_mailbox/transports/imap.py
+++ b/django_mailbox/transports/imap.py
@@ -22,6 +22,10 @@ class ImapTransport(object):
 
     def get_message(self):
         typ, inbox = self.server.search(None, 'ALL')
+
+        if not inbox[0]:
+            return
+
         for key in inbox[0].split():
             try:
                 typ, msg_contents = self.server.fetch(key, '(RFC822)')