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django-anymail/docs/esps/postmark.rst
2016-03-14 11:06:45 -07:00

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.. _postmark-backend:
Postmark
========
Anymail integrates with the `Postmark`_ transactional email service,
using their `HTTP email API`_.
.. _Postmark: https://postmarkapp.com/
.. _HTTP email API: http://developer.postmarkapp.com/developer-api-email.html
Settings
--------
.. rubric:: EMAIL_BACKEND
To use Anymail's Postmark backend, set:
.. code-block:: python
EMAIL_BACKEND = "anymail.backends.postmark.PostmarkBackend"
in your settings.py. (Watch your capitalization: Postmark spells their name with a
lowercase "m", so Anymail does too.)
.. setting:: ANYMAIL_POSTMARK_SERVER_TOKEN
.. rubric:: POSTMARK_SERVER_TOKEN
Required. A Postmark server token.
.. code-block:: python
ANYMAIL = {
...
"POSTMARK_SERVER_TOKEN": "<your server token>",
}
Anymail will also look for ``POSTMARK_SERVER_TOKEN`` at the
root of the settings file if neither ``ANYMAIL["POSTMARK_SERVER_TOKEN"]``
nor ``ANYMAIL_POSTMARK_SERVER_TOKEN`` is set.
You can override the server token for an individual message in
its :ref:`esp_extra <postmark-esp-extra>`.
.. setting:: ANYMAIL_POSTMARK_API_URL
.. rubric:: POSTMARK_API_URL
The base url for calling the Postmark API.
The default is ``POSTMARK_API_URL = "https://api.postmarkapp.com/"``
(It's unlikely you would need to change this.)
.. _postmark-esp-extra:
esp_extra support
-----------------
To use Postmark features not directly supported by Anymail, you can
set a message's :attr:`~anymail.message.AnymailMessage.esp_extra` to
a `dict` that will be merged into the json sent to Postmark's
`email API`_.
Example:
.. code-block:: python
message.esp_extra = {
'HypotheticalFuturePostmarkParam': '2022', # merged into send params
'server_token': '<API server token for just this message>',
}
(You can also set `"esp_extra"` in Anymail's
:ref:`global send defaults <send-defaults>` to apply it to all
messages.)
.. _email API: http://developer.postmarkapp.com/developer-api-email.html
Limitations and quirks
----------------------
Postmark has excellent support for standard email functionality, but does
not support all the tracking and reporting additions offered by some other
ESPs.
Anymail normally raises an :exc:`~anymail.exceptions.AnymailUnsupportedFeature`
error when you try to send a message using features that Postmark doesn't support
You can tell Anymail to suppress these errors and send the messages anyway --
see :ref:`unsupported-features`.
**Single tag**
Postmark allows a maximum of one tag per message. If your message has two or more
:attr:`~anymail.message.AnymailMessage.tags`, you'll get an
:exc:`~anymail.exceptions.AnymailUnsupportedFeature` error---or
if you've enabled :setting:`ANYMAIL_IGNORE_UNSUPPORTED_FEATURES`,
Anymail will use only the first tag.
**No metadata**
Postmark does not support attaching :attr:`~anymail.message.AnymailMessage.metadata`
to messages.
**No click-tracking**
Postmark supports :attr:`~anymail.message.AnymailMessage.track_open`,
but not :attr:`~anymail.message.AnymailMessage.track_clicks`.
**No delayed sending**
Postmark does not support :attr:`~anymail.message.AnymailMessage.send_at`.