Fixed #35514 -- Implemented dictionary-based MAILERS.

2026-05-13T21:00:56Z

See DEP 0018. Added: * MAILERS setting. * django.core.mail.mailers dict-like EmailBackend factory. * `using` argument to mail sending APIs. * `sent_using` attribute to mail.outbox messages in locmem backend. * MAILERS in startproject settings template, set to console backend. * AdminLogHandler.using argument. * BrokenLinkEmailsMiddleware.send_mail() method. Updated: * BaseEmailBackend to track the MAILERS alias used to construct it, and to report errors for unknown kwargs (OPTIONS). * EmailBackend implementations to initialize from kwargs (OPTIONS) only when MAILERS is being used. * smtp.EmailBackend to require `host` option and to default `port` option based on SSL/TLS options. * SimpleTestCase setup to substitute the locmem backend for all defined MAILERS configurations. * Django's tests that send mail to define MAILERS. Deprecated: * EMAIL_BACKEND and other backend-related EMAIL_* settings. * mail.get_connection(). * The `connection`, `fail_silently`, `auth_user`, and `auth_password` arguments to mail functions. * The EmailMessage.connection attribute. * BaseEmailBackend support for `fail_silently`. Backends that support fail_silently (SMTP, console, file) now implement it directly. * AdminEmailHandler.email_backend argument. Removed undocumented features without deprecation: * EmailMessage.get_connection() method. (send() now raises an error if a subclass has attempted to override it.) * EmailMessage.send() no longer sets self.connection to the connection used for sending. (It still _uses_ a pre-existing self.connection.) * AdminEmailHandler.connection() method. (Init now raises an error if a subclass has attempted to override it.) Thanks to Natalia Bidart for shepherding DEP 0018 and for extensive reviews and suggestions on the implementation. Thanks to Jacob Rief for the initial implementation and multiple iterations while refining the design. Co-authored-by: Jacob Rief

Refs #33476 -- Reformatted code with Black.

2022-02-07T19:37:05Z

Fixed #31840 -- Added support for Cross-Origin Opener Policy header.

2021-03-30T17:59:24Z

Thanks Adam Johnson and Tim Graham for the reviews. Co-authored-by: Tim Graham

Fixed #31232 -- Changed default SECURE_REFERRER_POLICY to 'same-origin'.

2020-02-05T13:39:01Z

Fixed #30426 -- Changed X_FRAME_OPTIONS setting default to DENY.

2019-09-09T06:15:26Z

Refs #30426 -- Changed default SECURE_CONTENT_TYPE_NOSNIFF to True.

2019-08-18T11:17:49Z

Removed default empty content argument from HttpResponse calls.

2019-02-09T21:27:32Z

Updated test URL patterns to use path() and re_path().

2018-12-31T15:47:32Z

Switched TestCase to SimpleTestCase where possible in Django's tests.

2018-11-27T13:58:44Z

Fixed #26755 -- Fixed test_middleware_classes_headers if Django source isn't writable.

2017-05-31T14:25:09Z

chango.git/tests/project_template, branch devmain