class SymfonyMailer
Same name in other branches
- 11.x core/lib/Drupal/Core/Mail/Plugin/Mail/SymfonyMailer.php \Drupal\Core\Mail\Plugin\Mail\SymfonyMailer
Defines an experimental mail backend, based on the Symfony mailer component.
This mail plugin acts as a drop-in replacement for the current default PHP mail plugin. Mail delivery is based on the Symfony mailer component. Hence, all transports registered by default in the Symfony mailer transport factory are available via configurable DSN.
By default, this plugin uses `sendmail://default` as the transport DSN. I.e., it attempts to use `/usr/sbin/sendmail -bs` in order to submit a message to the MTA. Sites hosted on operating systems without a working MTA (e.g., Windows) need to configure a suitable DSN.
The DSN can be set via the `mailer_dsn` key of the `system.mailer` config.
The following example shows how to switch the default mail plugin to the experimental Symfony mailer plugin with a custom DSN using config overrides in `settings.php`:
$config['system.mail']['interface'] = [
'default' => 'symfony_mailer',
];
$config['system.mail']['mailer_dsn'] = [
'scheme' => 'smtp',
'host' => 'smtp.example.com',
'port' => 25,
'user' => 'user',
'password' => 'pass',
'options' => [],
];
@internal
Hierarchy
- class \Drupal\Core\Mail\Plugin\Mail\SymfonyMailer implements \Drupal\Core\Mail\MailInterface, \Drupal\Core\Plugin\ContainerFactoryPluginInterface
Expanded class hierarchy of SymfonyMailer
See also
https://symfony.com/doc/current/mailer.html#using-built-in-transports
1 file declares its use of SymfonyMailer
- SymfonyMailerTest.php in core/
tests/ Drupal/ Tests/ Core/ Mail/ Plugin/ Mail/ SymfonyMailerTest.php
File
-
core/
lib/ Drupal/ Core/ Mail/ Plugin/ Mail/ SymfonyMailer.php, line 55
Namespace
Drupal\Core\Mail\Plugin\MailView source
class SymfonyMailer implements MailInterface, ContainerFactoryPluginInterface {
/**
* A list of headers that can contain multiple email addresses.
*
* @see \Symfony\Component\Mime\Header\Headers::HEADER_CLASS_MAP
*/
protected const MAILBOX_LIST_HEADERS = [
'from',
'to',
'reply-to',
'cc',
'bcc',
];
/**
* List of headers to skip copying from the message array.
*
* Symfony mailer sets Content-Type and Content-Transfer-Encoding according to
* the actual body content. Note that format=flowed is not supported by
* Symfony.
*
* @see \Symfony\Component\Mime\Part\TextPart
*/
protected const SKIP_HEADERS = [
'content-type',
'content-transfer-encoding',
];
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static($container->get('logger.channel.mail'));
}
/**
* Symfony mailer constructor.
*
* @param \Psr\Log\LoggerInterface $logger
* The logger service.
* @param \Symfony\Component\Mailer\MailerInterface $mailer
* The mailer service. Only specify an instance in unit tests, pass NULL in
* production.
*/
public function __construct(LoggerInterface $logger, ?MailerInterface $mailer = NULL) {
}
public function format(array $message) {
foreach ($message['body'] as &$part) {
// If the message contains HTML, convert it to plain text (which also
// wraps the mail body).
if ($part instanceof MarkupInterface) {
$part = MailFormatHelper::htmlToText($part);
}
else {
$part = MailFormatHelper::wrapMail($part);
}
}
// Join the body array into one string.
$message['body'] = implode("\n\n", $message['body']);
return $message;
}
public function mail(array $message) {
try {
$email = new Email();
$headers = $email->getHeaders();
foreach ($message['headers'] as $name => $value) {
if (!in_array(strtolower($name), self::SKIP_HEADERS, TRUE)) {
if (in_array(strtolower($name), self::MAILBOX_LIST_HEADERS, TRUE)) {
// Split values by comma, but ignore commas encapsulated in double
// quotes.
$value = str_getcsv($value, escape: '\\');
}
$headers->addHeader($name, $value);
}
}
$email->to($message['to'])
->subject($message['subject'])
->text($message['body']);
$mailer = $this->getMailer();
$mailer->send($email);
return TRUE;
} catch (\Exception $e) {
Error::logException($this->logger, $e);
return FALSE;
}
}
/**
* Returns a minimalistic Symfony mailer service.
*/
protected function getMailer() : MailerInterface {
if (!isset($this->mailer)) {
$dsn = \Drupal::config('system.mail')->get('mailer_dsn');
$dsnObject = new Dsn(...$dsn);
// Symfony Mailer and Transport classes both optionally depend on the
// event dispatcher. When provided, a MessageEvent is fired whenever an
// email is prepared before sending.
//
// The MessageEvent will likely play an important role in an upcoming mail
// API. However, emails handled by this plugin already were processed by
// hook_mail and hook_mail_alter. Firing the MessageEvent would leak those
// mails into the code path (i.e., event subscribers) of the new API.
// Therefore, this plugin deliberately refrains from injecting the event
// dispatcher.
$factories = Transport::getDefaultFactories(logger: $this->logger);
$transportFactory = new Transport($factories);
$transport = $transportFactory->fromDsnObject($dsnObject);
$this->mailer = new Mailer($transport);
}
return $this->mailer;
}
}
Members
Title Sort descending | Modifiers | Object type | Summary | Overriden Title |
---|---|---|---|---|
SymfonyMailer::create | public static | function | Creates an instance of the plugin. | Overrides ContainerFactoryPluginInterface::create |
SymfonyMailer::format | public | function | Formats a message prior to sending. | Overrides MailInterface::format |
SymfonyMailer::getMailer | protected | function | Returns a minimalistic Symfony mailer service. | |
SymfonyMailer::mail | public | function | Sends a message composed by \Drupal\Core\Mail\MailManagerInterface->mail(). | Overrides MailInterface::mail |
SymfonyMailer::MAILBOX_LIST_HEADERS | protected | constant | A list of headers that can contain multiple email addresses. | |
SymfonyMailer::SKIP_HEADERS | protected | constant | List of headers to skip copying from the message array. | |
SymfonyMailer::__construct | public | function | Symfony mailer constructor. |
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