Anymail: Django email integration for transactional ESPs

… This README is reused in multiple places:
* Github: project page, exactly as it appears here
* Docs: shared-intro section gets included in docs/index.rst
quickstart section gets included in docs/quickstart.rst
* PyPI: project page (via pyproject.toml readme; see also
hatch_build.py which edits in the release version number)
You can use docutils 1.0 markup, but not any Sphinx additions.
GitHub rst supports code-block, but no other block directives.

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… _shared-intro:

… This shared-intro section is also included in docs/index.rst

Anymail lets you send and receive email in Django using your choice
of transactional email service providers (ESPs). It extends the
standard django.core.mail with many common ESP-added features, providing
a consistent API that avoids locking your code to one specific ESP
(and making it easier to change ESPs later if needed).

Anymail currently supports these ESPs:

• Amazon SES
• Brevo (formerly SendinBlue)
• MailerSend
• Mailgun (Sinch transactional email)
• Mailjet (Sinch transactional email)
• Mandrill (MailChimp transactional email)
• Postal (self-hosted ESP)
• Postmark (ActiveCampaign transactional email)
• Resend
• SendGrid (Twilio transactional email)
• SparkPost (Bird transactional email)
• Unisender Go

Anymail includes:

• Integration of each ESP’s sending APIs into
  Django's built-in email <https://docs.djangoproject.com/en/stable/topics/email/>_
  package, including support for HTML, attachments, extra headers,
  and other standard email features
• Extensions to expose common ESP-added functionality, like tags, metadata,
  and tracking, with code that’s portable between ESPs
• Simplified inline images for HTML email
• Normalized sent-message status and tracking notification, by connecting
  your ESP’s webhooks to Django signals
• “Batch transactional” sends using your ESP’s merge and template features
• Inbound message support, to receive email through your ESP’s webhooks,
  with simplified, portable access to attachments and other inbound content

Anymail maintains compatibility with all Django versions that are in mainstream
or extended support, plus (usually) a few older Django versions, and is extensively
tested on all Python versions supported by Django. (Even-older Django versions
may still be covered by an Anymail extended support release; consult the
changelog <https://anymail.dev/en/stable/changelog/>_ for details.)

Anymail releases follow semantic versioning <https://semver.org/>_.
The package is released under the BSD license.

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:alt: documentation build status on ReadTheDocs

Resources

• Full documentation: https://anymail.dev/en/stable/
• Help and troubleshooting: https://anymail.dev/en/stable/help/
• Package on PyPI: https://pypi.org/project/django-anymail/
• Project on Github: https://github.com/anymail/django-anymail
• Changelog: https://anymail.dev/en/stable/changelog/

Anymail 1-2-3

… _quickstart:

… This quickstart section is also included in docs/quickstart.rst

Here’s how to send a message.
This example uses Mailgun, but you can substitute Mailjet or Postmark or SendGrid
or SparkPost or any other supported ESP where you see “mailgun”:

1. Install Anymail from PyPI:

   … code-block:: console

    $ pip install "django-anymail[mailgun]"
   

   (The [mailgun] part installs any additional packages needed for that ESP.
   Mailgun doesn’t have any, but some other ESPs do.)

2. Edit your project’s settings.py:

   … code-block:: python

    INSTALLED_APPS = [
        # ...
        "anymail",
        # ...
    ]
   
    ANYMAIL = {
        # (exact settings here depend on your ESP...)
        "MAILGUN_API_KEY": "<your Mailgun key>",
        "MAILGUN_SENDER_DOMAIN": 'mg.example.com',  # your Mailgun domain, if needed
    }
    EMAIL_BACKEND = "anymail.backends.mailgun.EmailBackend"  # or sendgrid.EmailBackend, or...
    DEFAULT_FROM_EMAIL = "[email protected]"  # if you don't already have this in settings
    SERVER_EMAIL = "[email protected]"  # ditto (default from-email for Django errors)
   

3. Now the regular Django email functions <https://docs.djangoproject.com/en/stable/topics/email/>_
   will send through your chosen ESP:

   … code-block:: python

    from django.core.mail import send_mail
   
    send_mail("It works!", "This will get sent through Mailgun",
              "Anymail Sender <[email protected]>", ["[email protected]"])
   

   You could send an HTML message, complete with an inline image,
   custom tags and metadata:

   … code-block:: python

    from django.core.mail import EmailMultiAlternatives
    from anymail.message import attach_inline_image_file
   
    msg = EmailMultiAlternatives(
        subject="Please activate your account",
        body="Click to activate your account: https://example.com/activate",
        from_email="Example <[email protected]>",
        to=["New User <[email protected]>", "[email protected]"],
        reply_to=["Helpdesk <[email protected]>"])
   
    # Include an inline image in the html:
    logo_cid = attach_inline_image_file(msg, "/path/to/logo.jpg")
    html = """<img alt="Logo" src="cid:{logo_cid}">
              <p>Please <a href="https://example.com/activate">activate</a>
              your account</p>""".format(logo_cid=logo_cid)
    msg.attach_alternative(html, "text/html")
   
    # Optional Anymail extensions:
    msg.metadata = {"user_id": "8675309", "experiment_variation": 1}
    msg.tags = ["activation", "onboarding"]
    msg.track_clicks = True
   
    # Send it:
    msg.send()
   

… END quickstart

See the full documentation <https://anymail.dev/en/stable/>_
for more features and options, including receiving messages and tracking
sent message status.