SMTPServerDisconnected                    Traceback (most recent call last)

<ipython-input-2-f35832660a49> in <module>()

----> 1 send_mail('Mydevops email','This is a test','sharkyun2017@gmail.com',['dockerhub@163.com'],fail_silently=False)

/home/shark/virtualenv/imoocc_py2.7/lib/python2.7/site-packages/django/core/mail/__init__.pyc in send_mail(subject, message, from_email, recipient_list, fail_silently, auth_user, auth_password, connection, html_message)

     60         mail.attach_alternative(html_message, 'text/html')

     61 

---> 62     return mail.send()

     63 

     64 

/home/shark/virtualenv/imoocc_py2.7/lib/python2.7/site-packages/django/core/mail/message.pyc in send(self, fail_silently)

    301             # send to.

    302             return 0

--> 303         return self.get_connection(fail_silently).send_messages([self])

    304 

    305     def attach(self, filename=None, content=None, mimetype=None):

/home/shark/virtualenv/imoocc_py2.7/lib/python2.7/site-packages/django/core/mail/backends/smtp.pyc in send_messages(self, email_messages)

     98             return

     99         with self._lock:

--> 100             new_conn_created = self.open()

    101             if not self.connection:

    102                 # We failed silently on open().

/home/shark/virtualenv/imoocc_py2.7/lib/python2.7/site-packages/django/core/mail/backends/smtp.pyc in open(self)

     56             })

     57         try:

---> 58             self.connection = connection_class(self.host, self.port, **connection_params)

     59 

     60             # TLS/SSL are mutually exclusive, so only attempt TLS over

/usr/lib64/python2.7/smtplib.pyc in __init__(self, host, port, local_hostname, timeout)

    253         self.esmtp_features = {}

    254         if host:

--> 255             (code, msg) = self.connect(host, port)

    256             if code != 220:

    257                 raise SMTPConnectError(code, msg)

/usr/lib64/python2.7/smtplib.pyc in connect(self, host, port)

    314             print>>stderr, 'connect:', (host, port)

    315         self.sock = self._get_socket(host, port, self.timeout)

--> 316         (code, msg) = self.getreply()

    317         if self.debuglevel > 0:

    318             print>>stderr, "connect:", msg

/usr/lib64/python2.7/smtplib.pyc in getreply(self)

    365             if line == '':

    366                 self.close()

--> 367                 raise SMTPServerDisconnected("Connection unexpectedly closed")

    368             if self.debuglevel > 0:

    369                 print>>stderr, 'reply:', repr(line)

SMTPServerDisconnected: Connection unexpectedly closed