diff --git a/emencia/django/newsletter/mailer.py b/emencia/django/newsletter/mailer.py
index 1e5f1cbb..e463855a 100644
--- a/emencia/django/newsletter/mailer.py
+++ b/emencia/django/newsletter/mailer.py
@@ -49,6 +49,7 @@ from django.contrib.staticfiles import finders
 from django.conf import settings
 
 from sorl.thumbnail import get_thumbnail
+from sorl.thumbnail.images import ImageFile
 
 from emencia.django.newsletter.models import Newsletter
 from emencia.django.newsletter.models import ContactMailingStatus
@@ -343,7 +344,8 @@ class NewsLetterSender(object):
             message_attachment.set_payload(fd.read())
             encode_base64(message_attachment)
 
-        fd.close()
+        if not isinstance(fd, ImageFile):
+            fd.close()
 
         cid = prefix + '%d'%obj.id