Yii2 Mailer isn't actually sending emails - yii2

Question

I followed a Yii2 tutorial for sending e-mails with attachment,
(See the link below if you need)
https://www.youtube.com/watch?v=c5pebmTUQjs&index=21&list=PLRd0zhQj3CBmusDbBzFgg3H20VxLx2mkF
And it worked on a level that the system reads the email info and the attachment that I want to send, and saves the info and attachment link in the db.
But when I tried to send emails to a real recipient and changed the mailer config, then tried to create a new email
there was a problem:
Invalid Configuration – yii\base\InvalidConfigException
Setting unknown property: Swift_MailTransport::host
Here is the config for mailer:
'mailer' => [
'class' => 'yii\swiftmailer\Mailer',
'viewPath' => '#app/mail',
'useFileTransport' => false,
'transport' => [
'host' => 'smtp.live.com',
'username' => 'username#live.com',
'password' => 'password',
'port' => '587',
'encryption' => 'tls',
]
],
And here is the actionCreate part of the EmailsController:
public function actionCreate()
{
$model = new Emails();
if ($model->load(Yii::$app->request->post()))
{
$model->attachment= UploadedFile::getInstance($model,'attachment');
if ($model->attachment)
{
$time=time();
$model->attachment->saveAs ('attachments/' .$time.'.' .$model->attachment->extension);
$model->attachment='attachments/'.$time.'.'.$model->attachment->extension;
}
if ($model->attachment)
{
$value= Yii::$app->mailer->compose()
->setFrom (['sharqpress#hotmail.com'=>'Al-Sharq Printing Press'])
->setTo ($model->reciever_email)
->setSubject ($model->subject)
->setHtmlBody ($model->content)
->attach ($model->attachment)
->send();
}
else
{
$value= Yii::$app->mailer->compose()
->setFrom (['sharqpress#hotmail.com'=>'Al-Sharq Printing Press'])
->setTo ($model->reciever_email)
->setSubject ($model->subject)
->setHtmlBody ($model->content)
->send();
}
$model->save();
return $this->redirect(['view','id'=>$model->id]);}
else
return $this -> render('create',['model'=>$model,]);
}

Answer 1

Your configuration needs additional class:
'mailer' => [
'class' => 'yii\swiftmailer\Mailer',
'viewPath' => '#app/mail',
'useFileTransport' => false,
'transport' => [
'class' => 'Swift_SmtpTransport', // <-- here
'host' => 'smtp.live.com',
'username' => 'username#live.com',
'password' => 'password',
'port' => '587',
'encryption' => 'tls',
]
],