Index: django/core/mail.py
===================================================================
--- django/core/mail.py	(revision 7339)
+++ django/core/mail.py	(working copy)
@@ -119,7 +119,7 @@
             # Nothing to do if the connection is already open.
             return False
         try:
-            self.connection = smtplib.SMTP(self.host, self.port)
+            self.connection = smtplib.SMTP(self.host, self.port, local_hostname=DNS_NAME.get_fqdn())
             if self.use_tls:
                 self.connection.ehlo()
                 self.connection.starttls()