ServerGrove mail checker

servergrove_mail_checker.php

<?php
<<<CONFIG
packages:
    - "swiftmailer/swiftmailer: ~5.0"
CONFIG;

$from = $argv[1];
$to = $argv[2];

$transport = \Swift_SmtpTransport::newInstance('mail.servergrove.com', 25)
    ->setUsername($from)
    ->setPassword($argv[3]);

$mailer = Swift_Mailer::newInstance($transport);

$message = Swift_Message::newInstance('Test message')
  ->setFrom($from)
  ->setTo($to)
  ->setBody('Hello world')
  ;

$result = $mailer->send($message);

if (1 === $result) {
    echo 'OK' . PHP_EOL;
} else {
    echo 'ERROR' . PHP_EOL;
}