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Move to the new DSN format for Mailer #12258

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Merged
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Sep 16, 2019
Merged

Move to the new DSN format for Mailer #12258

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48 changes: 33 additions & 15 deletions components/mailer.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -85,26 +85,44 @@ DSN::
$transport = Transport::fromDsn($dsn);

Where ``$dsn`` depends on the provider you want to use. For plain SMTP, use
``smtp://user:[email protected]`` or ``smtp://sendmail`` to use the ``sendmail``
binary. For third-party providers, refers to the following table:

==================== ================================== ================================== ================================
Provider SMTP HTTP API
==================== ================================== ================================== ================================
Amazon SES smtp://ACCESS_KEY:SECRET_KEY@ses http://ACCESS_KEY:SECRET_KEY@ses api://ACCESS_KEY:SECRET_KEY@ses
Google Gmail smtp://USERNAME:PASSWORD@gmail n/a n/a
Mailchimp Mandrill smtp://USERNAME:PASSWORD@mandrill http://KEY@mandrill api://KEY@mandrill
Mailgun smtp://USERNAME:PASSWORD@mailgun http://KEY:DOMAIN@mailgun api://KEY:DOMAIN@mailgun
Postmark smtp://ID:ID@postmark n/a api://KEY@postmark
Sendgrid smtp://apikey:KEY@sendgrid n/a api://KEY@sendgrid
==================== ================================== ================================== ================================
``smtp://user:[email protected]`` or ``sendmail+smtp://default`` to use the
``sendmail`` binary. To disable the transport, use ``null://null``.

For third-party providers, refers to the following table:

==================== ========================================== =========================================== ========================================
Provider SMTP HTTP API
==================== ========================================== =========================================== ========================================
Amazon SES ses+smtp://ACCESS_KEY:SECRET_KEY@default ses+https://ACCESS_KEY:SECRET_KEY@default ses+api://ACCESS_KEY:SECRET_KEY@default
Google Gmail gmail+smtp://USERNAME:PASSWORD@default n/a n/a
Mailchimp Mandrill mandrill+smtp://USERNAME:PASSWORD@default mandrill+https://KEY@default mandrill+api://KEY@default
Mailgun mailgun+smtp://USERNAME:PASSWORD@default mailgun+https://KEY:DOMAIN@default mailgun+api://KEY:DOMAIN@default
Postmark postmark+smtp://ID:ID@default n/a postmark+api://KEY@default
Sendgrid sendgrid+smtp://apikey:KEY@default n/a sendgrid+api://KEY@default
==================== ========================================== =========================================== ========================================

Instead of choosing a specific protocol, you can also let Symfony pick the
"best" one by omitting it from the scheme: for instance,
``mailgun://KEY:DOMAIN@default`` is equivalent to
``mailgun+https://KEY:DOMAIN@default``.

If you want to override the default host for a provider (to debug an issue with
a requestb.in like service), change ``default`` by your host:


.. code-block:: bash

mailgun+https://KEY:[email protected]
mailgun+https://KEY:[email protected]:99

Note that the protocol is *always* HTTPs and cannot be changed.

Failover Transport
------------------

You can create failover transport with the help of `||` operator::

$dsn = 'api://id@postmark || smtp://key@sendgrid';
$dsn = 'postmark+api://ID@default || sendgrid+smtp://KEY@default';

So if the first transport fails, the mailer will attempt to send through the
second transport.
Expand All @@ -115,7 +133,7 @@ Round Robin
If you want to send emails by using multiple transports in a round-robin fashion,
you can use the ``&&`` operator between the transports::

$dsn = 'api://id@postmark && smtp://key@sendgrid'
$dsn = 'postmark+api://ID@default && sendgrid+smtp://KEY@default';

Sending emails asynchronously
-----------------------------
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27 changes: 17 additions & 10 deletions mailer.rst
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Expand Up @@ -64,21 +64,28 @@ You'll now have a new line in your ``.env`` file that you can uncomment:

# .env
SENDGRID_KEY=
MAILER_DSN=smtp://$SENDGRID_KEY@sendgrid
MAILER_DSN=sendgrid://$SENDGRID_KEY@default

The ``MAILER_DSN`` isn't a *real* SMTP address: it's a simple format that offloads
most of the configuration work to mailer. The ``@sendgrid`` part of the address
activates the SendGrid mailer library that you just installed, which knows all
about how to deliver messages to SendGrid.
The ``MAILER_DSN`` isn't a *real* address: it's a simple format that offloads
most of the configuration work to mailer. The ``sendgrid`` scheme activates the
SendGrid provider that you just installed, which knows all about how to deliver
messages to SendGrid.

The *only* part you need to change is to set ``SENDGRID_KEY`` to your key (in
``.env`` or ``.env.local``).

Each transport will have different environment variables that the library will use
to configure the *actual* address and authentication for delivery. Some also have
options that can be configured with query parameters on end of the ``MAILER_DSN`` -
like ``?region=`` for Amazon SES. Some transports support sending via ``http``
or ``smtp`` - both work the same, but ``http`` is recommended when available.
Each provider has different environment variables that the Mailer uses to
configure the *actual* protocol, address and authentication for delivery. Some
also have options that can be configured with query parameters at the end of the
``MAILER_DSN`` - like ``?region=`` for Amazon SES. Some providers support
sending via ``http``, ``api`` or ``smtp``. Symfony chooses the best available
transport, but you can force to use one:

.. code-block:: bash

# .env
# force to use SMTP instead of HTTP (which is the default)
MAILER_DSN=sendgrid+smtp://$SENDGRID_KEY@default

.. tip::

Expand Down