Mail using SwiftMailer

email.php

<?php
require __DIR__.'/vendor/swiftmailer/swiftmailer/lib/swift_required.php';
$transport = (new Swift_SmtpTransport('mail.example.com', 25))
  ->setUsername('user')
  ->setPassword('qwer0987');
$mailer = new Swift_Mailer($transport);
$message = (new Swift_Message('Hello World'))
  ->setFrom(['demo@example.com' => 'Demo'])
  ->setTo(['minhazul.haque@example.com' => 'Md Minhazul Haque'])
  ->setBody('Email from Demo');
$result = $mailer->send($message);