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[Mailer] Document require_tls option #20701

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[Mailer] Document require_tls option #20701

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[Mailer] Document require_tls option
ssddanbrown Mar 1, 2025
7a2eb90
[Mailer] Moved version notice to after note for require_tls
ssddanbrown Mar 19, 2025
4871fd0
[Mailer] Tweaked version notice for require_tls option
ssddanbrown Mar 24, 2025
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23 changes: 23 additions & 0 deletions mailer.rst
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Expand Up @@ -420,6 +420,29 @@ setting the ``auto_tls`` option to ``false`` in the DSN::

This setting only works when the ``smtp://`` protocol is used.

Require use of TLS
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Maybe:

Suggested change
Require use of TLS
Enforce TLS

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Happy to change if preferred, but Enforce feels slightly less accurate to me. Enforce sounds like it'd change/force the connection in some manner and/or force TLS upon the whole connection process, whereas this option doesn't change the connection in any way, just ensures it's eventually used.

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I understand your concern about the term "Enforce" and I agree with you.
What do you think about "Ensure TLS" instead? It might better reflect that the option guarantees the use of TLS without actively altering the connection.

~~~~~~~~~~~~~~~~~~

You may want to ensure TLS is used, either directly or via ``STARTTLS``,
for sending mail over SMTP regardless of other options set or SMTP server
support. You can set TLS as required by calling ``setRequireTls(true)``
on the ``EsmtpTransport`` instance, or by setting the ``require_tls`` option
to ``true`` in the DSN::

$dsn = 'smtp://user:[email protected]?require_tls=true';

When TLS is set as required, a :class:`Symfony\\Component\\Mailer\\Exception\\TransportException`
will be thrown if a TLS connection cannot be achieved during initial communications
with the SMTP server.

.. note::

This setting only works when the ``smtp://`` protocol is used.

.. versionadded:: 7.3

The ``require_tls`` option was introduced in Symfony 7.3.

Binding to IPv4 or IPv6
~~~~~~~~~~~~~~~~~~~~~~~

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