diff -r ef03aff3b195 Doc/includes/email-simple.py
--- a/Doc/includes/email-simple.py	Wed Dec 21 23:43:50 2016 -0500
+++ b/Doc/includes/email-simple.py	Thu Dec 22 10:18:23 2016 -0500
@@ -3,7 +3,7 @@
 
 # Import the email modules we'll need
 from email.mime.text import MIMEText
-
+from email.utils import formatdate
 # Open a plain text file for reading.  For this example, assume that
 # the text file contains only ASCII characters.
 fp = open(textfile, 'rb')
@@ -16,6 +16,8 @@
 msg['Subject'] = 'The contents of %s' % textfile
 msg['From'] = me
 msg['To'] = you
+#RFC 5322 needs date to be present
+msg['Date'] = formatdate(localtime=True)
 
 # Send the message via our own SMTP server, but don't include the
 # envelope header.