swift_mail.php

      $to = array('ayman@test.com');
      
      // setup Swift mailer parameters
      $transport = Swift_SmtpTransport::newInstance( 'smtp.sendgrid.net', 465, 'ssl');
      $transport->setUsername('aymanfarhat ');
      $transport->setPassword('mypass');

      $swift = Swift_Mailer::newInstance( $transport );
       
      // create a message (subject)
      $message = new Swift_Message('testing swift mail');
       
      // attach the body of the email
      $message->setFrom('ayman@wamda.com');
      $message->setBody( 'test test', 'text/html' );
      $message->setTo( $to );
       
       // send email
      $swift->send($message);