Symfony 3和Mailhog：邮件没有被mailhog缓存

Question

In my dev enviroment I want to use mailhog to catch the emails. I've installed and configure my php.ini to sustitute the sendmail property. If in command line i run this

php -r "mail(......);" 

the mail gets captured by mailhog. The problem is with Symfony and Swiftmailer. To make a test i created a very simple controller with this:

/**
     * @return Response
     */
    public function homeAction() : Response
    {
        mail('[e-mail]', 'tasest', 'aaaa');
        $message = \Swift_Message::newInstance()
            ->setSubject('Hello Email')
            ->setFrom('[e-mail]')
            ->setTo('[e-mail]')
            ->setBody(
                'aaaaa',
                'text/html'
            );
        $this->get('mailer')->send($message);
        return $this->render('::base.html.twig');
    }

Now, the email sent by the mail function gets captured by mailhog. But not the mail sent by SwiftMailer.

In my config_dev I have this:

    # Swiftmailer Configuration
swiftmailer:
    transport: "sendmail"

which I think should be enough.

Am I missing something here?

P.S.: If i use a real address (instead of [e-mail]) the email gets sent and received

Update: I also tried to configure mailhog for smtp, parameters.yml:

mailer_transport: smtp
mailer_host: 127.0.0.1
mailer_port: 1025
mailer_user: null
mailer_password: null

config.yml:

swiftmailer:
    transport: "%mailer_transport%"
    host:      "%mailer_host%"
    port:      "%mailer_port%"
    username:  "%mailer_user%"
    password:  "%mailer_password%"
    spool:     { type: memory }

But the result was the same result.

Answer 1

Swiftmailer setup in Symfony will usually have a more complete configuration, particularly in config_dev.yml, to be explicit of where you would send it.

swiftmailer:
    transport: "%mailer_transport%"
    host:      "%mailer_host%"
    port:      "%mailer_port%"
    username:  "%mailer_user%"
    password:  "%mailer_password%"

Here, if Mailhog was on port 1025 (very typical), then parameters.yml in a development environment would be set like this, to fill in the parameters in the .yml file:

mailer_transport: smtp
mailer_host: 127.0.0.1
mailer_port: 1025
mailer_user: null
mailer_password: null