Index: django/core/mail.py
===================================================================
--- django/core/mail.py	(revision 5621)
+++ django/core/mail.py	(working copy)
@@ -265,7 +265,7 @@
         """
         if isinstance(filename, MIMEBase):
             assert content == mimetype == None
-            self.attachements.append(filename)
+            self.attachments.append(filename)
         else:
             assert content is not None
             self.attachments.append((filename, content, mimetype))