diff --git a/django_mailbox/models.py b/django_mailbox/models.py
index 6b76d26..74fce85 100644
--- a/django_mailbox/models.py
+++ b/django_mailbox/models.py
@@ -18,13 +18,13 @@ import sys
 import uuid
 
 import six
-from six.moves.urllib.parse import parse_qs, unquote, urlparse
 
 from django.conf import settings
 from django.core.files.base import ContentFile
 from django.core.mail.message import make_msgid
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
+from future.backports.urllib.parse import urlparse, parse_qs, unquote
 
 from .utils import convert_header_to_unicode, get_body_from_message
 from django_mailbox.signals import message_received
@@ -336,8 +336,7 @@ class Mailbox(models.Model):
                 msg.get_payload(decode=True).decode(content_charset)
             except LookupError:
                 logger.warning(
-                    "Unknown encoding %s; interpreting as ASCII!",
-                    content_charset
+                    "Unknown encoding %s; interpreting as ASCII!" % content_charset
                 )
                 msg.set_payload(
                     msg.get_payload(decode=True).decode(
@@ -347,8 +346,7 @@ class Mailbox(models.Model):
                 )
             except ValueError:
                 logger.warning(
-                    "Decoding error encountered; interpreting %s as ASCII!",
-                    content_charset
+                    "Decoding error encountered; interpreting %s as ASCII!" % content_charset
                 )
                 msg.set_payload(
                     msg.get_payload(decode=True).decode(