diff --git a/django_mailbox/models.py b/django_mailbox/models.py
index 4c76dc5..8ff1e39 100644
--- a/django_mailbox/models.py
+++ b/django_mailbox/models.py
@@ -719,24 +719,22 @@ def _rehydrate(self, msg):
                 if encoding and encoding.lower() == 'quoted-printable':
                     # Cannot use `email.encoders.encode_quopri due to
                     # bug 14360: http://bugs.python.org/issue14360
-                    with open(attachment.document.path, 'rb') as f:
-                        output = BytesIO()
-                        encode_quopri(
-                            BytesIO(
-                                f.read()
-                            ),
-                            output,
-                            quotetabs=True,
-                            header=False,
-                        )
-                        new.set_payload(
-                            output.getvalue().decode().replace(' ', '=20')
-                        )
+                    output = BytesIO()
+                    encode_quopri(
+                        BytesIO(
+                            attachment.document.read()
+                        ),
+                        output,
+                        quotetabs=True,
+                        header=False,
+                    )
+                    new.set_payload(
+                        output.getvalue().decode().replace(' ', '=20')
+                    )
                     del new['Content-Transfer-Encoding']
                     new['Content-Transfer-Encoding'] = 'quoted-printable'
                 else:
-                    with open(attachment.document.path, 'rb') as f:
-                        new.set_payload(f.read())
+                    new.set_payload(attachment.document.read())
                     del new['Content-Transfer-Encoding']
                     encode_base64(new)
             except MessageAttachment.DoesNotExist: