--- a/mail.py	Wed Apr 01 15:06:45 2015 +0200
+++ b/mail.py	Tue Apr 21 17:12:36 2015 +0200
@@ -25,6 +25,7 @@
 from email.mime.text import MIMEText
 from email.mime.image import MIMEImage
 from email.header import Header
+from email.utils import formatdate
 from socket import gethostname
 
 def header(ustring):
@@ -110,6 +111,7 @@
         msg['Message-id'] = msgid
     if references:
         msg['References'] = ', '.join(references)
+    msg['Date'] = formatdate()
     return msg