Class yii\swiftmailer\Mailer

Mailer implements a mailer based on SwiftMailer.

To use Mailer, you should configure it in the application configuration like the following:

[
    'components' => [
        'mailer' => [
            'class' => 'yii\swiftmailer\Mailer',
            'transport' => [
                'class' => 'Swift_SmtpTransport',
                'host' => 'localhost',
                'username' => 'username',
                'password' => 'password',
                'port' => '587',
                'encryption' => 'tls',
            ],
        ],
        // ...
    ],
    // ...
],

You may also skip the configuration of the $transport property. In that case, the default \Swift_SendmailTransport transport will be used to send emails.

You specify the transport constructor arguments using 'constructArgs' key in the config. You can also specify the list of plugins, which should be registered to the transport using 'plugins' key. For example:

'transport' => [
    'class' => 'Swift_SmtpTransport',
    'constructArgs' => ['localhost', 25]
    'plugins' => [
        [
            'class' => 'Swift_Plugins_ThrottlerPlugin',
            'constructArgs' => [20],
        ],
    ],
],

To send an email, you may use the following code:

Yii::$app->mailer->compose('contact/html', ['contactForm' => $form])
    ->setFrom('from@domain.com')
    ->setTo($form->email)
    ->setSubject($form->subject)
    ->send();

See also http://swiftmailer.org.