>  MAILER_URL=smtp://localhost:25?encryption=ssl&auth_mode=login&username=*****%40live.com&password=******

>  MAILER_URL=smtp://smtp-mail.outlook.com:25/encryption=ssl&auth_mode=login&username=*******%40live.com&password=********

public function sendMail($subject, $fromEmail, $toEmail, $emailTemplate, $argumentsArray, $emailType, $imgPath)
{
    $message = $this->setBasicEmailMessage($subject, $fromEmail, $emailTemplate, $argumentsArray, $emailType, $imgPath);
    $message->setTo($toEmail);
    $this->mailer->send($message);
}


private function setBasicEmailMessage($subject, $fromEmail, $emailTemplate, $argumentsArray, $emailType, $imgPath)
{
    $message = (new Swift_Message($subject))->setFrom($fromEmail);
    $img = $message->embed(Swift_Image::fromPath($imgPath));
    $argumentsArray['img'] = $img;
    $message->setBody(
        $this->templating->render(
            $emailTemplate,
            $argumentsArray
        ),
        $emailType
    );

    return $message;
}