SMTP.php

<?php
/**
 * SMTP
 *
 * @author Jason Johnson <jason@php-smtp.org>
 * @copyright Copyright (c) 2008, Jason Johnson
 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
 * @version 1.0
 * @package php-smtp
 */

/**
 * Report only critical errors. Set this to E_ALL to report all PHP errors
 */
error_reporting(E_ERROR);


/**
 * Unlimited execution time to accomodate the infinite run() loop
 */
set_time_limit(0);


/**
 * IP address and port to use. Set SMTP_HOST to the public-facing IP address you want
 * the SMTP server to listen on.
 */
define('SMTP_HOST', '127.0.0.1');
define('SMTP_PORT', 25);


/**
 * A comma separated list of domains, e.g. "example1.com,example2.com" When set to this,
 * the server will accept email for accounts *@example1.com and *@example2.com.
 */
define('SMTP_VALID_DOMAINS', '');


/**
 * Messages and storage
 */
define('SMTP_INBOUND', './inbound/');
define('SMTP_OUTBOUND', './outbound/');

// Default max message size of 2MB
define('SMTP_MAX_SIZE', 2097152);

// Read from sockets in 1K chunks
define('SMTP_CHUNK_SIZE', 1024);


/**
 * SMTP response codes
 */
// 200's
define('SMTP_211', '211 System status, or system help reply');
define('SMTP_214', '214 Help message');
define('SMTP_220', '220 Service ready');
define('SMTP_221', '221 Service closing transmission channel');
define('SMTP_235', '235 Authentication successful');
define('SMTP_250', '250 Requested mail action okay, completed');
define('SMTP_251', '251 User not local');

// 300's
define('SMTP_354', '354 Start mail input; end with <CRLF>.<CRLF>');

// 400's
define('SMTP_421', '421 Service not available');
define('SMTP_450', '450 Requested mail action not taken: mailbox unavailable');
define('SMTP_451', '451 Requested action aborted: error in processing');
define('SMTP_452', '452 Requested action not taken: insufficient system storage');

// 500's
define('SMTP_500', '500 Syntax error, command unrecognized');
define('SMTP_501', '501 Syntax error in parameters or arguments');
define('SMTP_502', '502 Command not implemented');
define('SMTP_503', '503 Bad sequence of commands');
define('SMTP_504', '504 Command parameter not implemented');
define('SMTP_535', '535 Authentication failed');
define('SMTP_550', '550 Requested action not taken: mailbox unavailable');
define('SMTP_551', '551 User not local');
define('SMTP_552', '552 Requested mail action aborted: exceeded storage allocation');
define('SMTP_553', '553 Requested action not taken: mailbox name not allowed');
define('SMTP_554', '554 Transaction failed');


/**
 * Logging
 */
define('SMTP_LOG', './log/smtp.log');
define('SMTP_CRITICAL', 1);
define('SMTP_ERROR', 2);
define('SMTP_WARNING', 3);
define('SMTP_NOTICE', 4);
define('SMTP_DEBUG', 5);

// Log level, set to SMTP_DEBUG to report all server-server and client-server communication
define('SMTP_LOG_LEVEL', SMTP_DEBUG);


/**
 * Indexing
 */
define('SMTP_INDEX', './index');


/**
 * API - an "Event" notifies registered methods of something happening, whereas a "Hook"
 * directly changes how something works.
 *
 * Methods receiving events will be passed documented values and should not return anything
 * Methods receiving hook challenges will be passed documentd values and should return either true or false
 */
// Events
define('SMTP_API_AUTH_CHALLENGE', 1);
define('SMTP_API_AUTH_SUCCESS', 2);
define('SMTP_API_AUTH_FAILURE', 3);

// Hooks
define('SMTP_API_AUTH', 1);

require_once 'SMTP_Server_API.php';
require_once 'SMTP_Server_Log.php';
require_once 'SMTP_Server_Index.php';
require_once 'SMTP_Server_Socket.php';
require_once 'SMTP_Server_Session.php';
require_once 'SMTP_Server_Relay_Session.php';
require_once 'SMTP_Server_Relay.php';
require_once 'SMTP_Server.php';
?>