<?php
/**
* This uses the SMTP class alone to check that a connection can be made to an SMTP server,
* authenticate, then disconnect
*/
//SMTP needs accurate times, and the PHP time zone MUST be set
//This should be done in your php.ini, but this is how to do it if you don't have access to that
date_default_timezone_set('Etc/UTC');
require '../PHPMailerAutoload.php';
//Create a new SMTP instance
$smtp = new SMTP;
//Enable connection-level debug output
$smtp->do_debug = SMTP::DEBUG_CONNECTION;
try {
//Connect to an SMTP server
if (!$smtp->connect('mail.example.com', 25)) {
throw new Exception('Connect failed');
}
//Say hello
if (!$smtp->hello(gethostname())) {
throw new Exception('EHLO failed: ' . $smtp->getError()['error']);
}
//Get the list of ESMTP services the server offers
$e = $smtp->getServerExtList();
//If server can do TLS encryption, use it
if (is_array($e) && array_key_exists('STARTTLS', $e)) {
$tlsok = $smtp->startTLS();
if (!$tlsok) {
throw new Exception('Failed to start encryption: ' . $smtp->getError()['error']);
}
//Repeat EHLO after STARTTLS
if (!$smtp->hello(gethostname())) {
throw new Exception('EHLO (2) failed: ' . $smtp->getError()['error']);
}
//Get new capabilities list, which will usually now include AUTH if it didn't before
$e = $smtp->getServerExtList();
}
//If server supports authentication, do it (even if no encryption)
if (is_array($e) && array_key_exists('AUTH', $e)) {
if ($smtp->authenticate('username', 'password')) {
echo "Connected ok!";
} else {
throw new Exception('Authentication failed: ' . $smtp->getError()['error']);
}
}
} catch (Exception $e) {
echo 'SMTP error: ' . $e->getMessage(), "\n";
}
//Whatever happened, close the connection.
$smtp->quit(true);
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