Send mail in django with celery

tasks.py

from celery import task
from django.core.mail import send_mail
from .models import Order

@task
def order_created(order_id):
"""
Task to send an e-mail notification when an order is
successfully created.
"""

order = Order.objects.get(id=order_id)
subject = 'Order nr. {}'.format(order.id)
message = 'Dear {},\n\nYou have successfully placed an order.\
Your order id is {}.'.format(order.first_name,
order.id)
mail_sent = send_mail(subject,
message,
'[email protected]',
[order.email])
return mail_sent

views.py

from .tasks import order_created

# launch asynchronous task
order_created.delay(order.id)