Yii 2: Unable to send log via mail - php

Question

This is my mailer component.
As you can see, because of my test purposes, I'm using email on file
'mailer' => [
'class' => 'yii\swiftmailer\Mailer',
'viewPath' => '#common/mail',
'useFileTransport' => true,
],
This is my log component.
'log' => [
'traceLevel' => YII_DEBUG ? 3 : 0,
'targets' => [
[
// for this target, see http://www.yiiframework.com/doc-2.0/guide-runtime-logging.html
'class' => 'yii\log\EmailTarget',
'levels' => ['error'],
'categories' => ['yii\db\*', 'email_test'],
'message' => [
'from' => ESHOP_EMAIL,
'to' => DEVELOPER_EMAIL,
'subject' => 'Errore db [' . YII_ENV . ']',
],
],
],
],
In siteControlle->actionIndex() I'm testing log and email component in this way
public function actionIndex()
{
Yii::error("testing mail log", "email_test");
Yii::$app->mailer->compose()
->setFrom([ESHOP_EMAIL => ESHOP])
->setTo( DEVELOPER_EMAIL)
->setSubject("actionIndex executed on time " . date ("H:i:s"))
->setTextBody("Useless body")
->send();
return $this->render('index');
}
As i expect, at every reload of the index page I got 2 .eml files created inside frontend/runtime/mail folder.
So SwiftMailer is working, and even the log system.
Now the problem
I try to remove use of file from mailer component, commenting the row
'useFileTransport' => true,
When I reload the index page, I got the SECOND MAIL, the one manually composed and sent, but I DO NOT RECEIVE the first mail, the one that should be automatically composed and sent by log system using SwiftMailer.
What's wrong?

Answer 1

Sorry to everyone.
The problem was a mistake in the destination address. Using the logger the error caused email cannot be sent, but using the manual sending the destination address error is simply ignored and the email is sent.

Answer 2

I think the default value for 'useFileTransport' is true. Is better set to false and don't comment it

Answer 3

If you don't use a php function for sending eMail you need a transport like this
'mailer' => [
'class' => 'yii\swiftmailer\Mailer',
'viewPath' => '#common/mail',
//'useFileTransport' => true,
'useFileTransport' => false, //set this property to false to send mails to real email addresses
//comment the following array to send mail using php's mail function
'transport' => [
'class' => 'Swift_SmtpTransport',
'host' => 'smtp.gmail.com',
'username' => 'your_mail#gmail.com',
'password' => 'your_password',
'port' => '587',
'encryption' => 'tls',
],
And if you don't use gmail you need the configure the parameter in a proper way.