SwiftMailer - PHP - How to disable ssl certificate validation

Question

I need to disable the validation of ssl certificate for developing purpose but i don't find anything about this in official documentation. http://swiftmailer.org/docs/introduction.html

I'm using php 5.6 and Symfony2 (v2.7).

The configuration reference of SwiftMailerBundle is:

swiftmailer:
   transport:            smtp
   username:             ~
   password:             ~
   host:                 localhost
   port:                 false
   encryption:           ~
   auth_mode:            ~
   spool:
      type:                 file
      path:                 '%kernel.cache_dir%/swiftmailer/spool'
   sender_address:       ~
   antiflood:
      threshold:            99
      sleep:                0
   delivery_address:     ~
   disable_delivery:     ~
   logging:              '%kernel.debug%'

Answer 1

I found an undocumented feature

symfony 2.8, php 5.6, swiftmailer-bundle 2.5.3

Swiftmailer Configuration

swiftmailer:
   stream_options:
    ssl:
        verify_peer: false
        verify_peer_name: false

Answer 2

The configuration option suggested by Maxim didn't work for me (Symfony 3.4 and Swift Mailer 5.4)

The cleanest solution I could find is the following:

$transport = $mailer->getTransport();
if($transport instanceof \Swift_Transport_EsmtpTransport){
    $transport->setStreamOptions([
        'ssl' => ['allow_self_signed' => true, 'verify_peer' => false, 'verify_peer_name' => false]
    ]);
}

where $mailer is your SwiftMailer instance which you use in some service or controller

Answer 3

I think this is a dirty hack but it works for me fine ;)

$https['ssl']['verify_peer'] = FALSE;
$https['ssl']['verify_peer_name'] = FALSE; // seems to work fine without this line so far
/** @var \Swift_Transport_EsmtpTransport $transport */
$transport = $this->get('swiftmailer.mailer.default.transport');
$transport->setStreamOptions($https);

Answer 4

Getting the swiftmailer.mailer.default.transport from Symfony and setting following configuration works for me:

$transport = $this->get("swiftmailer.mailer.default.transport");

// disable SSL certificate validation
$transport->setStreamOptions(array('ssl' => array('allow_self_signed' => true, 'verify_peer' => false)));

I don't think that it is possible to set the stream options in the .yml file.