diff --git a/django_mailbox/management/commands/getmail.py b/django_mailbox/management/commands/getmail.py
index 2ee8947..6041782 100644
--- a/django_mailbox/management/commands/getmail.py
+++ b/django_mailbox/management/commands/getmail.py
@@ -11,7 +11,7 @@ class Command(BaseCommand):
             self.stdout.write('Gathering messages for %s\n' % mailbox.name)
             messages = mailbox.get_new_mail()
             for message in messages:
-                self.stdout.write('Recieved %s (from %s)\n' % (
+                self.stdout.write('Received %s (from %s)\n' % (
                         message.subject,
                         message.from_address
                     ))
diff --git a/django_mailbox/models.py b/django_mailbox/models.py
index 098ff36..b0325e5 100755
--- a/django_mailbox/models.py
+++ b/django_mailbox/models.py
@@ -170,6 +170,10 @@ class Mailbox(models.Model):
                 if part.get('Content-Disposition') is None:
                     continue
                 filename = part.get_filename()
+                # ignore SMIME extension
+                filename_basename, filename_extension = os.path.splitext(filename)
+                if filename_extension in ('.p7s',):
+                    continue
                 data = part.get_payload(decode=True)
                 if not data:
                     continue