Sending activation emails on EC2 server using SMTP

Question

This is my first question on here, so thanks everyone for reading this. I'm following the tutorials by PHP academy on the Register & Login part.

I'm using Amazon's EC2 service (Which is working great so far) and I would like to know how to change my code to use my SMTP server (From another webhost) to send my activation emails. See code below. If you have any questions, please let me know. Again, this is my first time.

Thanks for the help.

Kind regards, Enrico Eusman

General.php file:

function email($to, $ubject, $body) {
mail($to, $subject, $body, 'From: activate@proxico.nl');}

Users.php file:

function register_user($register_data) {

array_walk($register_data, 'array_sanitize');
        $register_data['password'] = md5($register_data['password']);

        $fields = '`' . implode('`, `', array_keys($register_data)) . '`';
        $data = '\'' . implode('\', \'', $register_data) . '\'';

        mysql_query("INSERT INTO `users` ($fields) VALUES ($data)");
        email($register_data['email'], 'Activate your account',"Hello " . $register_data['first_name'] . ",\n\nYou need to activate your account, so use the link below:\n\nhttp://ec2-54-229-189-136.eu-west-1.compute.amazonaws.com/activate.php?email=" . $register_data['email'] . "&email_code=" . $register_data['email_code'] . " \n\n - Proxico");

}

Register.php file:

if (isset($_GET['success']) && empty($_GET['success'])) {
    echo 'You\'ve been registered successfully! Please check your email for an activation link. Didn\'t get an email? Click here to resend.';
} else {
    if (empty($_POST) === false && empty($errors) === true) {
    $register_data = array(
        'username'      => $_POST['username'],
        'password'      => $_POST['password'],
        'first_name'    => $_POST['first_name'],
        'last_name'     => $_POST['last_name'],
        'email'         => $_POST['email'],
        'email_code'    => md5($_POST['username'] + microtime())
    );

    register_user($register_data);
    header('Location: register.php?success');
    exit();


} else if (empty($errors) === false) {
    echo output_errors($errors);
    // output register errors
}

Answer 1

Use Swiftmailer.

function email($to, $subject, $body) {
    require_once('swift/lib/swift_required.php');
    
    try {
        $transport = Swift_SmtpTransport::newInstance('smtp.example.org', 25)
            ->setUsername('your username')
            ->setPassword('your password')
        ;
        $mailer = Swift_Mailer::newInstance($transport);
        $message = Swift_Message::newInstance()
            ->setFrom('activate@proxico.nl', 'Activation - Proxico')
            ->setTo($to)
            ->setSubject($subject)
            ->setBody($body, 'text/html')
        ;
        return $mailer->send($message);

    } catch (Exception $e) {
        return false;
    }
}