Looks like you are trying to send a mail (send_mail()) and your mail settings in your settings.py are not correct.
You should check the docs for sending emails.
For debugging purposes you could setup a local smtpserver with this command:
python -m smtpd -n -c DebuggingServer localhost:1025
and adjust your mail settings accordingly:
EMAIL_HOST = 'localhost'
EMAIL_PORT = 1025
This is documented here: Testing e-mail sending
As an alternative to starting a dedicated debugging server you could use the console.EmailBackend which was added to Django recently.