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django-celery-email - A Celery-backed Django Email Backend

A Django 1.2+ email backend that uses a Celery queue for out-of-band sending of the messages.

Warning

This version of django-celery-email is NOT compatible with versions of Celery prior to 2.2.0. If you need to use Celery 2.0.x or 2.1.x, please use django-celery-email 0.1.1.

Using django-celery-email

To enable django-celery-email for your project you need to add djcelery_email to INSTALLED_APPS:

INSTALLED_APPS += ("djcelery_email",)

You must then set django-celery-email as your EMAIL_BACKEND:

EMAIL_BACKEND = 'djcelery_email.backends.CeleryEmailBackend'

By default django-celery-email will use Django's builtin SMTP email backend for the actual sending of the mail. If you'd like to use another backend, you may set it in CELERY_EMAIL_BACKEND just like you would normally have set EMAIL_BACKEND before you were using Celery. In fact, the normal installation procedure will most likely be to get your email working using only Django, then change EMAIL_BACKEND to CELERY_EMAIL_BACKEND, and then add the new EMAIL_BACKEND setting from above.

If you need to set any of the settings (attributes) you'd normally be able to set on a Celery Task class had you written it yourself, you may specify them in a dict in the CELERY_EMAIL_TASK_CONFIG setting:

CELERY_EMAIL_TASK_CONFIG = {
    'queue' : 'email',
    'rate_limit' : '50/m',
    ...
}

There are some default settings. Unless you specify otherwise, the equivalent of the following settings will apply:

CELERY_EMAIL_TASK_CONFIG = {
    'name': 'djcelery_email_send',
    'ignore_result': True,
}

After this setup is complete, and you have a working Celery install, sending email will work exactly like it did before, except that the sending will be handled by your Celery workers:

from django.core import mail

emails = (
    ('Hey Man', "I'm The Dude! So that's what you call me.", 'dude@aol.com', ['mr@lebowski.com']),
    ('Dammit Walter', "Let's go bowlin'.", 'dude@aol.com', ['wsobchak@vfw.org']),
)
results = mail.send_mass_mail(emails)

results will be a list of celery AsyncResult objects that you may ignore, or use to check the status of the email delivery task, or even wait for it to complete if want. You have to enable a result backend and set ignore_result to False in CELERY_EMAIL_TASK_CONFIG if you want to use these. See the Celery docs for more info.

len(results) will be the number of emails you attempted to send, and is in no way a reflection on the success or failure of their delivery.

Changelog

1.0.2 - 2012.02.21

  • Task and backend now accept kwargs that can be used in signal handlers.
  • Task now returns the result from the email sending backend.
  • Thanks to Yehonatan Daniv for these changes.

1.0.1 - 2011.10.06

  • Fixed a bug that resulted in tasks that were throwing errors reporting success.
  • If there is an exception thrown by the sending email backend, the result of the task will now be this exception.

Recent activity

ftyurin

Commits by ftyurin were pushed to ftyurin/django-celery-email

00e8227 - Save backend constructor kwargs in the init_kwargs and use them in the task when calling get_connection
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