gistfile1.py

@receiver(post_save, sender=Feedback)
def post_save_feedback(sender, instance, *args, **kwargs):
    params = {'user': instance.user, 'title': instance.title, 'content': instance.content}
    subject = "There is a feedback from the app"
    message_plain = render_to_string('%s/feedback/feedback.txt' % EMAIL_ROOT, params)
    message_html = render_to_string('%s/feedback/feedback.html' % EMAIL_ROOT, params)

    send_mail = SendMail(to=settings.ADMIN_CC_LIST, subject=subject,
            message_plain=message_plain, message_html=message_html)
    send_mail.start()
    
    
    
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from django.core.mail import send_mail
from django.core.exceptions import ImproperlyConfigured
import threading

class SendMail(threading.Thread):
    def __init__(self, to, subject, message_plain, message_html=None):
        super(SendMail, self).__init__()
        from django.conf import settings
        self.from_email = settings.EMAIL_HOST_USER
        self.to = to
        self.subject = subject
        self.message_plain = message_plain
        self.message_html = message_html

    def run(self):
        try:
            html_message = self.message_html or self.message_plain
            send_mail(
                from_email=self.from_email,
                recipient_list=self.to,
                subject=self.subject,
                message=self.message_plain,
                html_message=html_message
            )
            print('successfully sent the mail')
        except e:
            print("Failed to send mail")
            print(e)