class EmailThread(threading.Thread):

    def __init__(self, subject, html_content, recipient_list):
        self.subject = subject
self.recipient_list = recipient_list
self.html_content = html_content
threading.Thread.__init__(self)

def run(self):
    msg = EmailMessage(self.subject, self.html_content, EMAIL_HOST_USER,
        self.recipient_list)
msg.content_subtype = 'html'
msg.send()
how to send asynchronous email using django  