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159 lines
4.6 KiB
ReStructuredText
159 lines
4.6 KiB
ReStructuredText
.. _sendgrid-backend:
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SendGrid
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========
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Anymail integrates with the `SendGrid`_ email service,
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using their `Web API v2`_. (Their v3 API does not support sending mail,
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but the v3 API calls *do* get information about mail sent through v2.)
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.. _SendGrid: https://sendgrid.com/
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.. _Web API v2: https://sendgrid.com/docs/API_Reference/Web_API/mail.html
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Settings
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--------
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.. rubric:: EMAIL_BACKEND
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To use Anymail's SendGrid backend, set:
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.. code-block:: python
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EMAIL_BACKEND = "anymail.backends.sendgrid.SendGridBackend"
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in your settings.py. (Watch your capitalization: SendGrid spells
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their name with an uppercase "G", so Anymail does too.)
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.. setting:: ANYMAIL_SENDGRID_API_KEY
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.. rubric:: SENDGRID_API_KEY
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A SendGrid API key with "Mail Send" permission.
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(Manage API keys in your `SendGrid API key settings`_.)
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Either an API key or both :setting:`SENDGRID_USERNAME <ANYMAIL_SENDGRID_USERNAME>`
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and :setting:`SENDGRID_PASSWORD <ANYMAIL_SENDGRID_PASSWORD>` are required.
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.. code-block:: python
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ANYMAIL = {
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...
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"SENDGRID_API_KEY": "<your API key>",
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}
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Anymail will also look for ``SENDGRID_API_KEY`` at the
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root of the settings file if neither ``ANYMAIL["SENDGRID_API_KEY"]``
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nor ``ANYMAIL_SENDGRID_API_KEY`` is set.
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.. _SendGrid API key settings: https://app.sendgrid.com/settings/api_keys
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.. setting:: ANYMAIL_SENDGRID_USERNAME
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.. setting:: ANYMAIL_SENDGRID_PASSWORD
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.. rubric:: SENDGRID_USERNAME and SENDGRID_PASSWORD
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SendGrid credentials with the "Mail" permission. You should **not**
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use the username/password that you use to log into SendGrid's
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dashboard. Create credentials specifically for sending mail in the
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`SendGrid credentials settings`_.
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.. code-block:: python
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ANYMAIL = {
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...
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"SENDGRID_USERNAME": "<sendgrid credential with Mail permission>",
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"SENDGRID_PASSWORD": "<password for that credential>",
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}
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Either username/password or :setting:`SENDGRID_API_KEY <ANYMAIL_SENDGRID_API_KEY>`
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are required (but not both).
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Anymail will also look for ``SENDGRID_USERNAME`` and ``SENDGRID_PASSWORD`` at the
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root of the settings file if neither ``ANYMAIL["SENDGRID_USERNAME"]``
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nor ``ANYMAIL_SENDGRID_USERNAME`` is set.
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.. _SendGrid credentials settings: https://app.sendgrid.com/settings/credentials
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.. setting:: ANYMAIL_SENDGRID_API_URL
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.. rubric:: SENDGRID_API_URL
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The base url for calling the SendGrid v2 API.
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The default is ``SENDGRID_API_URL = "https://api.sendgrid.com/api/"``
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(It's unlikely you would need to change this.)
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.. _sendgrid-esp-extra:
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esp_extra support
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-----------------
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To use SendGrid features not directly supported by Anymail, you can
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set a message's :attr:`~anymail.message.AnymailMessage.esp_extra` to
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a `dict` of parameters for SendGrid's `mail.send API`_. Any keys in
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your :attr:`esp_extra` dict will override Anymail's normal values
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for that parameter, except that `'x-smtpapi'` will be merged.
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Example:
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.. code-block:: python
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message.esp_extra = {
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'x-smtpapi': {
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"asm_group": 1, # Assign SendGrid unsubscribe group for this message
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"asm_groups_to_display": [1, 2, 3]
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}
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}
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(You can also set `"esp_extra"` in Anymail's
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:ref:`global send defaults <send-defaults>` to apply it to all
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messages.)
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.. _mail.send API: https://sendgrid.com/docs/API_Reference/Web_API/mail.html#-send
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Limitations and quirks
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----------------------
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**Duplicate attachment filenames**
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Anymail is not capable of communicating multiple attachments with
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the same filename to SendGrid. (This also applies to multiple attachments
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with *no* filename, though not to inline images.)
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If you are sending multiple attachments on a single message,
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make sure each one has a unique, non-empty filename.
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**Message-ID**
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SendGrid does not return any sort of unique id from its send API call.
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Knowing a sent message's ID can be important for later queries about
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the message's status.
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To work around this, Anymail generates a new Message-ID for each
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outgoing message, provides it to SendGrid, and includes it in the
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:attr:`~anymail.message.AnymailMessage.anymail_status`
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attribute after you send the message.
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In later SendGrid API calls, you can match that Message-ID
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to SendGrid's ``smtp-id`` event field.
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Anymail will use the domain of the message's :attr:`from_email`
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to generate the Message-ID. (If this isn't desired, you can supply
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your own Message-ID in the message's :attr:`extra_headers`.)
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**Invalid Addresses**
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SendGrid will accept *and send* just about anything as
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a message's :attr:`from_email`. (And email protocols are
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actually OK with that.)
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(Tested March, 2016)
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