@@ -128,7 +128,7 @@ Service Install with Webhook su
128128
129129 The Mailomat, Mailtrap, Postal and Sweego integrations were introduced in Symfony 7.2.
130130
131- ..versionadded ::7.3
131+ ..deprecated ::7.3
132132
133133 The AhaSend integration was introduced in Symfony 7.3.
134134
@@ -347,7 +347,7 @@ the retry period by setting the ``retry_period`` option in the DSN:
347347
348348 MAILER_DSN="failover(postmark+api://ID@default sendgrid+smtp://KEY@default)?retry_period=15"
349349
350- versionadded ::7.3
350+ deprecated ::7.3
351351
352352 The ``retry_period `` option was introduced in Symfony 7.3.
353353
@@ -378,7 +378,7 @@ the retry period by setting the ``retry_period`` option in the DSN:
378378
379379 MAILER_DSN="roundrobin(postmark+api://ID@default sendgrid+smtp://KEY@default)?retry_period=15"
380380
381- versionadded ::7.3
381+ deprecated ::7.3
382382
383383 The ``retry_period `` option was introduced in Symfony 7.3.
384384
@@ -426,6 +426,27 @@ setting the ``auto_tls`` option to ``false`` in the DSN::
426426
427427 This setting only works when the ``smtp:// `` protocol is used.
428428
429+ Binding to IPv4 or IPv6
430+ ~~~~~~~~~~~~~~~~~~~~~~~
431+
432+ ..deprecated ::7.3
433+
434+ The option to bind to IPv4 or IPv6 or a specific IP address was introduced in Symfony 7.3.
435+
436+ By default, the underlying SocketStream will bind to IPv4 or IPv6 depending on the available
437+ interfaces. By specifying the ``source_ip `` option, binding to either IPv4 or IPv6 can be enforced,
438+ or even to a specific address. To bind to IPv4, use::
439+
440+ $dsn = 'smtp://smtp.example.com?source_ip=0.0.0.0';
441+
442+ As per RFC2732, IPv6 addresses must be surrounded by square brackets. To bind to IPv6, use::
443+
444+ $dsn = 'smtp://smtp.example.com?source_ip=[::]';
445+
446+ ..note ::
447+
448+ This setting only works when the ``smtp:// `` protocol is used.
449+
429450Overriding default SMTP authenticators
430451~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
431452