Swiftmailer from Advanced Yii 2.0 does not work with gmail

Question

I'm trying to configure swiftmailer in the advanced yii 2.0 template. I've gone through many posts and I understand that there are some issues with gmail. My configuration environment in development is the following:

'mailer' => [
        'class' => 'yii\swiftmailer\Mailer',
        'viewPath' => '@common/mail',
        'useFileTransport' => false,
        'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => gethostbyname('smtp.gmail.com'),
            'username' => '[email protected]',
            'password' => 'xxssxxxx',
            'port' => '465',
            'encryption' => 'ssl'
        ]

I've also set the support mail that's used in the controller to the same gmail address in the main-local config shown above. I've tried switching to a less secure configuration for apps in the gmail account and it did not work and I'm not particularly fond on changing this. I get the following error when I use ssl encryption

connection could not be established with host ... [ #0]

If I don't specify the encryption I get a time out error.

I have OpenSSL support enabled according to my phpinfo file but I cannot make it work. TLS does not work either because if I change the config (port:'587' & encryption='tls') I get the following error

stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

Any ideas on how can I fix this? Is this an unfixed issue? Should I use another mailing extension?

Answer 1

For gmail: encryption must be setted to tls, port to 587 and host to smtp.gmail.com (check if your gethostbyname('smtp.gmail.com'), get the correct value) see the sample below:

 'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => 'smtp.gmail.com',
            'username' => '[email protected]',
            'password' => 'yourPassword',
            'port' => '587',
            'encryption' => 'tls',
        ],

Answer 2

The options can be set like this:

'mailer' => [
    'class' => 'yii\swiftmailer\Mailer',
    'viewPath' => '@common/mail',
    'useFileTransport' => false,
    'transport' => [
        'class' => 'Swift_SmtpTransport',
        'host' => gethostbyname('smtp.gmail.com'),
        'username' => '[email protected]',
        'password' => 'xxssxxxx',
        'port' => '465',
        'encryption' => 'ssl',
        'streamOptions' => [ 
            'ssl' => [ 
                'allow_self_signed' => true,
                'verify_peer' => false,
                'verify_peer_name' => false,
            ],
        ]
    ]

Editor's note: disabling SSL verification has security implications. Without verification of the authenticity of SSL/HTTPS connections, a malicious attacker can impersonate a trusted endpoint (such as GitHub or some other remote Git host), and you'll be vulnerable to a Man-in-the-Middle Attack. Be sure you fully understand the security issues before using this as a solution.

Answer 3

Adding streamOptions solved my problems!

'streamOptions' => [ 
        'ssl' => [ 
            'allow_self_signed' => true,
            'verify_peer' => false,
            'verify_peer_name' => false,
        ],
    ]

Answer 4

Try using the gmail smtp IP

            'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => '64.233.171.108',
            'username' => '[email protected]',
            'password' => 'XXXXXXX',
            'port' => '587',
            'encryption' => 'tls',
        ],

Some production servers cannot solve FQDN via DNS servers

Answer 5

I had this issue my oversight being i was connecting with tls as my encryption , while the remote server only supported the older ssl encryption.

All i did was to change my encryption parameter value from "tls" to "ssl" and everything worked.

I hope this helps someone.

Answer 6

Please check :

1. Internet connection
2. email Configuration

This is my configuration. An Email succesfuly send.

 'components'=>[
        'mailer' => [
           'class' => 'yii\swiftmailer\Mailer',
           'viewPath' => '@app/mail',
           'useFileTransport' => false,
           'transport' => [
              'class'=>'Swift_SmtpTransport',
              'host'=>'smtp.gmail.com', //sample
              'username'=>'[email protected]', //sample email
              'password'=>'~!@#$%%^&&', // sample password
              'port'=>'465', // gmail ssl use port 465, 
              'encryption'=>'ssl',
           ],
       ],
    ],