EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'localhost'
EMAIL_HOST_USER = None
EMAIL_HOST_PASSWORD = None
EMAIL_PORT = 25
EMAIL_USE_TLS = True
#EMAIL_USE_SSL = True

EMAIL_HOST_USER = None
EMAIL_HOST_PASSWORD = None

user@hostname # telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 localhost ESMTP Postfix (Ubuntu)
ehlo localhost
[...]
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN

In [1]: from django.core.mail import send_mail
In [2]: send_mail('A Django Mail', 'This e-mail was sebt with Django.','admin@localhost', ['admin
   ...: @localhost'], fail_silently=False)

In [1]: import smtplib

In [2]: server = smtplib.SMTP('localhost')

In [3]: server.set_debuglevel(1)

In [4]: server.sendmail('admin@localhost','my.friend@gmail.com','smtplibtest')
send: 'mail FROM:<admin@localhost> size=17rn'
reply: b'250 2.1.0 Okrn'
reply: retcode (250); Msg: b'2.1.0 Ok'
send: 'rcpt TO:<my.friend@gmail.com>rn'
reply: b'250 2.1.5 Okrn'
reply: retcode (250); Msg: b'2.1.5 Ok'
send: 'datarn'
reply: b'354 End data with <CR><LF>.<CR><LF>rn'
reply: retcode (354); Msg: b'End data with <CR><LF>.<CR><LF>'
data: (354, b'End data with <CR><LF>.<CR><LF>')
send: b'smtplibtestrn.rn'
reply: b'250 2.0.0 Ok: queued as 0F45F2C019Frn'
reply: retcode (250); Msg: b'2.0.0 Ok: queued as 0F45F2C019F'
data: (250, b'2.0.0 Ok: queued as 0F45F2C019F')
Out[4]: {}