Send mail using mail class in cakephp 3

Send mail using gmail smtp cakephp 3

to send mail using gmail in cakephp you nedd to follow these steps

1. open your yourproject/config/app.php

2. in your app.php replace
'EmailTransport' => [
        'default' => [
            'className' => 'Mail',
            // The following keys are used in SMTP transports
            'host' => 'localhost',
            'port' => 25,
            'timeout' => 30,
            'username' => 'user',
            'password' => 'secret',
            'client' => null,
            'tls' => null,
            'url' => env('EMAIL_TRANSPORT_DEFAULT_URL', null),
        ],

        to this code 
'EmailTransport' => [
        'default' => [
            'className' => 'Mail',
            // The following keys are used in SMTP transports
            'host' => 'localhost',
            'port' => 25,
            'timeout' => 30,
            'username' => 'user',
            'password' => 'secret',
            'client' => null,
            'tls' => null,
            'url' => env('EMAIL_TRANSPORT_DEFAULT_URL', null),
        ],
        'gmail'=> [
          'host' => 'ssl://smtp.gmail.com',
          'port' => 465,
          'username' => 'abc@gmail.com',  //your gmail address
          'password' => 'abcd123',        //your gmail password
          'className' => 'Smtp',
          'log' => true,
          'context' => [
            'ssl' => [
                'verify_peer' => false,
                'verify_peer_name' => false,
                'allow_self_signed' => true
            ]
          ]
        ],
    ],


3. Now open your appController file and add this
    use Cake\Mailer\Email;

4. now you can send email from your controller by using this code

       $email = new Email('default');
       $email
            ->transport('gmail')
            ->from(['abcx.com' => 'abcx.com'])
            ->to($to)
            ->subject($subject)
             ->emailFormat('html')
            ->viewVars(array('msg' => $msg))
            ->send($msg);


 5. you can create a function in appController and use this function into all controller

  public function sendUserEmail($to,$subject,$msg)
    {
       $email = new Email('default');
       $email
            ->transport('gmail')
            ->from(['abcx.com' => 'abcx.com'])
            ->to($to)
            ->subject($subject)
             ->emailFormat('html')
            ->viewVars(array('msg' => $msg))
            ->send($msg);

    }

    and use this code to send mail from any controller

     $this->sendUserEmail($email,$aSubject,$aBody);

     This tutorial is related to

     How to send mail using gmail in cakephp 3
     send mail in cakephp 3
     how to send mail in cakephp3 with gmail
     how to use mail class cakephp 3