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egroupware_official/emailadmin/inc/class.emailadmin_wizard.inc.php

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<?php
/**
* EGroupware EMailAdmin: Wizard to create mail accounts
*
* @link http://www.stylite.de
* @package emailadmin
* @author Ralf Becker <rb@stylite.de>
* @copyright (c) 2013-14 by Ralf Becker <rb@stylite.de>
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @version $Id$
*/
/**
* Wizard to create mail accounts
*
* Wizard uses follow heuristic to search for IMAP accounts:
* 1. query Mozilla ISPDB for domain from email (perfering SSL over STARTTLS over insecure connection)
* 2. guessing and verifying in DNS server-names based on domain from email:
* - (imap|smtp).$domain, mail.$domain
* - MX for $domain
* - replace host in MX with (imap|smtp) or mail
*/
class emailadmin_wizard
{
/**
* Enable logging of IMAP communication to given path, eg. /tmp/autoconfig.log
*/
const DEBUG_LOG = null;
/**
* Connection timeout in seconds used in autoconfig, can and should be really short!
*/
const TIMEOUT = 2;
/**
* Prefix for callback names
*
* Used as static::APP_CLASS in etemplate::exec(), to allow mail app extending this class.
*/
const APP_CLASS = 'emailadmin.emailadmin_wizard.';
/**
* 0: No SSL
*/
const SSL_NONE = emailadmin_account::SSL_NONE;
/**
* 1: STARTTLS on regular tcp connection/port
*/
const SSL_STARTTLS = emailadmin_account::SSL_STARTTLS;
/**
* 3: SSL (inferior to TLS!)
*/
const SSL_SSL = emailadmin_account::SSL_SSL;
/**
* 2: require TLS version 1+, no SSL version 2 or 3
*/
const SSL_TLS = emailadmin_account::SSL_TLS;
/**
* 8: if set, verify certifcate (currently not implemented in Horde_Imap_Client!)
*/
const SSL_VERIFY = emailadmin_account::SSL_VERIFY;
/**
* Log exception including trace to error-log, instead of just displaying the message.
*
* @var boolean
*/
public static $debug = false;
/**
* Methods callable via menuaction
*
* @var array
*/
public $public_functions = array(
'add' => true,
'edit' => true,
);
/**
* Supported ssl types including none
*
* @var array
*/
public static $ssl_types = array(
self::SSL_TLS => 'TLS', // SSL with minimum TLS (no SSL v.2 or v.3), requires Horde_Imap_Client-2.16.0/Horde_Socket_Client-1.1.0
self::SSL_SSL => 'SSL',
self::SSL_STARTTLS => 'STARTTLS',
'no' => 'no',
);
/**
* Convert ssl-type to Horde secure parameter
*
* @var array
*/
public static $ssl2secure = array(
'SSL' => 'ssl',
'STARTTLS' => 'tls',
'TLS' => 'tlsv1', // SSL with minimum TLS (no SSL v.2 or v.3), requires Horde_Imap_Client-2.16.0/Horde_Socket_Client-1.1.0
);
/**
* Convert ssl-type to eMailAdmin acc_(imap|sieve|smtp)_ssl integer value
*
* @var array
*/
public static $ssl2type = array(
'TLS' => self::SSL_TLS,
'SSL' => self::SSL_SSL,
'STARTTLS' => self::SSL_STARTTLS,
'no' => self::SSL_NONE,
);
/**
* Available IMAP login types
*
* @var array
*/
public static $login_types = array(
'' => 'Username specified below for all',
'standard' => 'username from account',
'vmailmgr' => 'username@domainname',
//'admin' => 'Username/Password defined by admin',
'uidNumber' => 'UserId@domain eg. u1234@domain',
'email' => 'EMail-address from account',
);
/**
* List of domains know to not support Sieve
*
* Used to switch Sieve off by default, thought users can allways try switching it on.
* Testing not existing Sieve with google takes a long time, as ports are open,
* but not answering ...
*
* @var array
*/
public static $no_sieve_blacklist = array('gmail.com', 'googlemail.com');
/**
* Is current use a mail administrator / has run rights for EMailAdmin
*
* @var boolean
*/
protected $is_admin = false;
/**
* Constructor
*/
public function __construct()
{
$this->is_admin = isset($GLOBALS['egw_info']['user']['apps']['emailadmin']);
// for some reason most translation for account-wizard are in mail
translation::add_app('mail');
// Horde use locale for translation of error messages
common::setlocale(LC_MESSAGES);
}
/**
* Step 1: IMAP account
*
* @param array $content
* @param type $msg
*/
public function add(array $content=array(), $msg='', $msg_type='success')
{
// otherwise we cant switch to ckeditor in edit
egw_ckeditor_config::set_csp_script_src_attrs();
$tpl = new etemplate_new('emailadmin.wizard');
if (empty($content['account_id']))
{
$content['account_id'] = $GLOBALS['egw_info']['user']['account_id'];
}
// add some defaults if not already set (+= does not overwrite existing values!)
$content += array(
'ident_realname' => $GLOBALS['egw']->accounts->id2name($content['account_id'], 'account_fullname'),
'ident_email' => $GLOBALS['egw']->accounts->id2name($content['account_id'], 'account_email'),
'acc_imap_port' => 993,
'manual_class' => 'emailadmin_manual',
);
egw_framework::message($msg ? $msg : (string)$_GET['msg'], $msg_type);
if (!empty($content['acc_imap_host']) || !empty($content['acc_imap_username']))
{
$readonlys['button[manual]'] = true;
unset($content['manual_class']);
}
$tpl->exec(static::APP_CLASS.'autoconfig', $content, array(
'acc_imap_ssl' => self::$ssl_types,
), $readonlys, $content, 2);
}
/**
* Try to autoconfig an account
*
* @param array $content
*/
public function autoconfig(array $content)
{
// user pressed [Skip IMAP] --> jump to SMTP config
if ($content['button'] && key($content['button']) == 'skip_imap')
{
unset($content['button']);
if (!isset($content['acc_smtp_host'])) $content['acc_smtp_host'] = ''; // do manual mode right away
return $this->smtp($content, lang('Skipping IMAP configuration!'));
}
$content['output'] = '';
$sel_options = $readonlys = array();
$content['connected'] = $connected = false;
if (empty($content['acc_imap_username']))
{
$content['acc_imap_username'] = $content['ident_email'];
}
if (!empty($content['acc_imap_host']))
{
$hosts = array($content['acc_imap_host'] => true);
if ($content['acc_imap_port'] > 0 && !in_array($content['acc_imap_port'], array(143,993)))
{
$ssl_type = (string)array_search($content['acc_imap_ssl'], self::$ssl2type);
if ($ssl_type === '') $ssl_type = 'insecure';
$hosts[$content['acc_imap_host']] = array(
$ssl_type => $content['acc_imap_port'],
);
}
}
elseif (($ispdb = self::mozilla_ispdb($content['ident_email'])) && count($ispdb['imap']))
{
$content['ispdb'] = $ispdb;
$content['output'] .= lang('Using data from Mozilla ISPDB for provider %1', $ispdb['displayName'])."\n";
$hosts = array();
foreach($ispdb['imap'] as $server)
{
if (!isset($hosts[$server['hostname']]))
{
$hosts[$server['hostname']] = array('username' => $server['username']);
}
if (strtoupper($server['socketType']) == 'SSL') // try TLS first
{
$hosts[$server['hostname']]['TLS'] = $server['port'];
}
$hosts[$server['hostname']][strtoupper($server['socketType'])] = $server['port'];
// make sure we prefer SSL over STARTTLS over insecure
if (count($hosts[$server['hostname']]) > 2)
{
$hosts[$server['hostname']] = self::fix_ssl_order($hosts[$server['hostname']]);
}
}
}
else
{
$hosts = $this->guess_hosts($content['ident_email'], 'imap');
}
// iterate over all hosts and try to connect
foreach($hosts as $host => $data)
{
$content['acc_imap_host'] = $host;
// by default we check SSL, STARTTLS and at last an insecure connection
if (!is_array($data)) $data = array('TLS' => 993, 'SSL' => 993, 'STARTTLS' => 143, 'insecure' => 143);
foreach($data as $ssl => $port)
{
if ($ssl === 'username') continue;
$content['acc_imap_ssl'] = (int)self::$ssl2type[$ssl];
$e = null;
try {
$content['output'] .= "\n".egw_time::to('now', 'H:i:s').": Trying $ssl connection to $host:$port ...\n";
$content['acc_imap_port'] = $port;
$imap = self::imap_client($content, self::TIMEOUT);
//$content['output'] .= array2string($imap->capability());
$imap->login();
$content['output'] .= "\n".lang('Successful connected to %1 server%2.', 'IMAP', ' '.lang('and logged in'))."\n";
if (!$imap->isSecureConnection())
{
$content['output'] .= lang('Connection is NOT secure! Everyone can read eg. your credentials.')."\n";
$content['acc_imap_ssl'] = 'no';
}
//$content['output'] .= "\n\n".array2string($imap->capability());
$content['connected'] = $connected = true;
break 2;
}
catch(Horde_Imap_Client_Exception $e)
{
switch($e->getCode())
{
case Horde_Imap_Client_Exception::LOGIN_AUTHENTICATIONFAILED:
$content['output'] .= "\n".$e->getMessage()."\n";
break 3; // no need to try other SSL or non-SSL connections, if auth failed
case Horde_Imap_Client_Exception::SERVER_CONNECT:
$content['output'] .= "\n".$e->getMessage()."\n";
if ($ssl == 'STARTTLS') break 2; // no need to try insecure connection on same port
break;
default:
$content['output'] .= "\n".get_class($e).': '.$e->getMessage().' ('.$e->getCode().')'."\n";
//$content['output'] .= $e->getTraceAsString()."\n";
}
if (self::$debug) _egw_log_exception($e);
}
catch(Exception $e) {
$content['output'] .= "\n".get_class($e).': '.$e->getMessage().' ('.$e->getCode().')'."\n";
//$content['output'] .= $e->getTraceAsString()."\n";
if (self::$debug) _egw_log_exception($e);
}
}
}
if ($connected) // continue with next wizard step: define folders
{
unset($content['button']);
return $this->folder($content, lang('Successful connected to %1 server%2.', 'IMAP', ' '.lang('and logged in')).
($imap->isSecureConnection() ? '' : "\n".lang('Connection is NOT secure! Everyone can read eg. your credentials.')));
}
// add validation error, if we can identify a field
if (!$connected && $e instanceof Horde_Imap_Client_Exception)
{
switch($e->getCode())
{
case Horde_Imap_Client_Exception::LOGIN_AUTHENTICATIONFAILED:
etemplate_new::set_validation_error('acc_imap_username', lang($e->getMessage()));
etemplate_new::set_validation_error('acc_imap_password', lang($e->getMessage()));
break;
case Horde_Imap_Client_Exception::SERVER_CONNECT:
etemplate_new::set_validation_error('acc_imap_host', lang($e->getMessage()));
break;
}
}
$readonlys['button[manual]'] = true;
unset($content['manual_class']);
$sel_options['acc_imap_ssl'] = self::$ssl_types;
$tpl = new etemplate_new('emailadmin.wizard');
$tpl->exec(static::APP_CLASS.'autoconfig', $content, $sel_options, $readonlys, $content, 2);
}
/**
* Step 2: Folder - let user select trash, sent, drafs and template folder
*
* @param array $content
* @param string $msg =''
* @param Horde_Imap_Client_Socket $imap =null
*/
public function folder(array $content, $msg='', Horde_Imap_Client_Socket $imap=null)
{
if (isset($content['button']))
{
list($button) = each($content['button']);
unset($content['button']);
switch($button)
{
case 'back':
return $this->add($content);
case 'continue':
return $this->sieve($content);
}
}
$content['msg'] = $msg;
if (!isset($imap)) $imap = self::imap_client ($content);
try {
//_debug_array($content);
$sel_options['acc_folder_sent'] = $sel_options['acc_folder_trash'] =
$sel_options['acc_folder_draft'] = $sel_options['acc_folder_template'] =
$sel_options['acc_folder_junk'] = self::mailboxes($imap, $content);
}
catch(Exception $e) {
$content['msg'] = $e->getMessage();
if (self::$debug) _egw_log_exception($e);
}
$tpl = new etemplate_new('emailadmin.wizard.folder');
$tpl->exec(static::APP_CLASS.'folder', $content, $sel_options, array(), $content);
}
/**
* Query mailboxes and (optional) detect special folders
*
* @param Horde_Imap_Client_Socket $imap
* @param array &$content=null on return values for acc_folder_(sent|trash|draft|template)
* @return array with folders as key AND value
* @throws Horde_Imap_Client_Exception
*/
public static function mailboxes(Horde_Imap_Client_Socket $imap, array &$content=null)
{
// query all subscribed mailboxes
$mailboxes = $imap->listMailboxes('*', Horde_Imap_Client::MBOX_SUBSCRIBED, array(
'special_use' => true,
'attributes' => true, // otherwise special_use is only queried, but not returned ;-)
'delimiter' => true,
));
//_debug_array($mailboxes);
// list mailboxes by special-use attributes
$folders = $attributes = $all = array();
foreach($mailboxes as $mailbox => $data)
{
foreach($data['attributes'] as $attribute)
{
$attributes[$attribute][] = $mailbox;
}
$folders[$mailbox] = $mailbox.': '.implode(', ', $data['attributes']);
}
// pre-select send, trash, ... folder for user, by checking special-use attributes or common name(s)
foreach(array(
'acc_folder_sent' => array('\\sent', 'sent'),
'acc_folder_trash' => array('\\trash', 'trash'),
'acc_folder_draft' => array('\\drafts', 'drafts'),
'acc_folder_template' => array('', 'templates'),
'acc_folder_junk' => array('\\junk', 'junk', 'spam'),
) as $name => $common_names)
{
// first check special-use attributes
if (($special_use = array_shift($common_names)))
{
foreach((array)$attributes[$special_use] as $mailbox)
{
if (empty($content[$name]) || strlen($mailbox) < strlen($content[$name]))
{
$content[$name] = $mailbox;
}
}
}
// no special use folder found, try common names
if (empty($content[$name]))
{
foreach($mailboxes as $mailbox => $data)
{
$delimiter = !empty($data['delimiter']) ? $data['delimiter'] : '.';
$name_parts = explode($delimiter, strtolower($mailbox));
if (array_intersect($name_parts, $common_names) &&
(empty($content[$name]) || strlen($mailbox) < strlen($content[$name]) && substr($content[$name], 0, 6) != 'INBOX'.$delimiter))
{
//error_log(__METHOD__."() $mailbox --> ".substr($name, 11).' folder');
$content[$name] = $mailbox;
}
//else error_log(__METHOD__."() $mailbox does NOT match array_intersect(".array2string($name_parts).', '.array2string($common_names).')='.array2string(array_intersect($name_parts, $common_names)));
}
}
$folders[$content[$name]] .= ' --> '.substr($name, 11).' folder';
}
// uncomment for infos about selection process
//$content['folder_output'] = implode("\n", $folders);
return array_combine(array_keys($mailboxes), array_keys($mailboxes));
}
/**
* Step 3: Sieve
*
* @param array $content
* @param string $msg =''
*/
public function sieve(array $content, $msg='')
{
static $sieve_ssl2port = array(
self::SSL_TLS => 5190,
self::SSL_SSL => 5190,
self::SSL_STARTTLS => array(4190, 2000),
self::SSL_NONE => array(4190, 2000),
);
$content['msg'] = $msg;
if (isset($content['button']))
{
list($button) = each($content['button']);
unset($content['button']);
switch($button)
{
case 'back':
return $this->folder($content);
case 'continue':
if (!$content['acc_sieve_enabled'])
{
return $this->smtp($content);
}
break;
}
}
// first try: hide manual config
if (!isset($content['acc_sieve_enabled']))
{
list(, $domain) = explode('@', $content['acc_imap_username']);
$content['acc_sieve_enabled'] = (int)!in_array($domain, self::$no_sieve_blacklist);
$content['manual_class'] = 'emailadmin_manual';
}
else
{
unset($content['manual_class']);
$readonlys['button[manual]'] = true;
}
// set default ssl and port
if (!isset($content['acc_sieve_ssl'])) list($content['acc_sieve_ssl']) = each(self::$ssl_types);
if (empty($content['acc_sieve_port'])) $content['acc_sieve_port'] = $sieve_ssl2port[$content['acc_sieve_ssl']];
// check smtp connection
if ($button == 'continue')
{
$content['sieve_connected'] = false;
$content['sieve_output'] = '';
unset($content['manual_class']);
if (empty($content['acc_sieve_host']))
{
$content['acc_sieve_host'] = $content['acc_imap_host'];
}
// if use set non-standard port, use it
if (!in_array($content['acc_sieve_port'], (array)$sieve_ssl2port[$content['acc_sieve_ssl']]))
{
$data = array($content['acc_sieve_ssl'] => $content['acc_sieve_port']);
}
else // otherwise try all standard ports
{
$data = $sieve_ssl2port;
}
foreach($data as $ssl => $ports)
{
foreach((array)$ports as $port)
{
$content['acc_sieve_ssl'] = $ssl;
$ssl_label = self::$ssl_types[$ssl];
$e = null;
try {
$content['sieve_output'] .= "\n".egw_time::to('now', 'H:i:s').": Trying $ssl_label connection to $content[acc_sieve_host]:$port ...\n";
$content['acc_sieve_port'] = $port;
$useTLS = false;
$host = $content['acc_sieve_host'];
switch($content['acc_sieve_ssl'])
{
case self::SSL_SSL:
$host = 'ssl://'.$host;
break;
case self::SSL_TLS:
$host = 'tls://'.$host;
break;
case self::SSL_STARTTLS:
$useTLS = true;
}
PEAR::setErrorHandling(PEAR_ERROR_EXCEPTION);
$sieve = new Net_Sieve();
if (self::DEBUG_LOG)
{
$sieve->setDebug(true, function($sieve, $_msg) //use (&$content)
{
unset($sieve); // not used here
//$content['sieve_output'] .= "\n".$_msg;
if (($fp = fopen(self::DEBUG_LOG, 'a')))
{
fwrite($fp, $_msg."\n");
fclose($fp);
}
});
}
// connect to sieve server
$sieve->connect($host, $port, $options=null, $useTLS);
$content['sieve_output'] .= "\n".lang('Successful connected to %1 server%2.', 'Sieve','');
// and log in
$sieve->login($content['acc_imap_username'], $content['acc_imap_password']);
$content['sieve_output'] .= ' '.lang('and logged in')."\n";
$content['sieve_connected'] = true;
unset($content['button']);
return $this->smtp($content, lang('Successful connected to %1 server%2.', 'Sieve',
' '.lang('and logged in')));
}
// PEAR::setErrorHandling(PEAR_ERROR_EXCEPTION) throws just Exception
catch(Exception $e) {
switch($e->getCode())
{
case 61: // connection refused
case 60: // connection timed out
case 65: // no route ot host (imap.googlemail.com returns that for ssl/5190)
$content['sieve_output'] .= "\n".$e->getMessage()."\n";
break;
default:
$content['sieve_output'] .= "\n".$e->getMessage().' ('.$e->getCode().')'."\n";
$content['sieve_output'] .= $e->getTraceAsString()."\n";
break;
}
if (self::$debug) _egw_log_exception($e);
}
}
}
// not connected, and default ssl/port --> reset again to secure settings
if ($data == $sieve_ssl2port)
{
list($content['acc_sieve_ssl']) = each(self::$ssl_types);
$content['acc_sieve_port'] = $sieve_ssl2port[$content['acc_sieve_ssl']];
}
}
// add validation error, if we can identify a field
if (!$content['sieve_connected'] && $e instanceof Exception)
{
switch($e->getCode())
{
case 61: // connection refused
case 60: // connection timed out (imap.googlemail.com returns that for none-ssl/4190/2000)
case 65: // no route ot host (imap.googlemail.com returns that for ssl/5190)
etemplate_new::set_validation_error('acc_sieve_host', lang($e->getMessage()));
etemplate_new::set_validation_error('acc_sieve_port', lang($e->getMessage()));
break;
}
$content['msg'] = lang('No sieve support detected, either fix configuration manually or leave it switched off.');
$content['acc_sieve_enabled'] = 0;
}
$sel_options['acc_sieve_ssl'] = self::$ssl_types;
$tpl = new etemplate_new('emailadmin.wizard.sieve');
$tpl->exec(static::APP_CLASS.'sieve', $content, $sel_options, $readonlys, $content, 2);
}
/**
* Step 4: SMTP
*
* @param array $content
* @param string $msg =''
*/
public function smtp(array $content, $msg='')
{
static $smtp_ssl2port = array(
self::SSL_NONE => 25,
self::SSL_SSL => 465,
self::SSL_TLS => 465,
self::SSL_STARTTLS => 587,
);
$content['msg'] = $msg;
if (isset($content['button']))
{
list($button) = each($content['button']);
unset($content['button']);
switch($button)
{
case 'back':
return $this->sieve($content);
}
}
// first try: hide manual config
if (!isset($content['acc_smtp_host']))
{
$content['manual_class'] = 'emailadmin_manual';
}
else
{
unset($content['manual_class']);
$readonlys['button[manual]'] = true;
}
// copy username/password from imap
if (!isset($content['acc_smtp_username'])) $content['acc_smtp_username'] = $content['acc_imap_username'];
if (!isset($content['acc_smtp_password'])) $content['acc_smtp_password'] = $content['acc_imap_password'];
// set default ssl
if (!isset($content['acc_smtp_ssl'])) list($content['acc_smtp_ssl']) = each(self::$ssl_types);
if (empty($content['acc_smtp_port'])) $content['acc_smtp_port'] = $smtp_ssl2port[$content['acc_smtp_ssl']];
// check smtp connection
if ($button == 'continue')
{
$content['smtp_connected'] = false;
$content['smtp_output'] = '';
unset($content['manual_class']);
if (!empty($content['acc_smtp_host']))
{
$hosts = array($content['acc_smtp_host'] => true);
if ((string)$content['acc_smtp_ssl'] !== (string)self::SSL_TLS || $content['acc_smtp_port'] != $smtp_ssl2port[$content['acc_smtp_ssl']])
{
$ssl_type = (string)array_search($content['acc_smtp_ssl'], self::$ssl2type);
$hosts[$content['acc_smtp_host']] = array(
$ssl_type => $content['acc_smtp_port'],
);
}
}
elseif($content['ispdb'] && !empty($content['ispdb']['smtp']))
{
$content['smtp_output'] .= lang('Using data from Mozilla ISPDB for provider %1', $content['ispdb']['displayName'])."\n";
$hosts = array();
foreach($content['ispdb']['smtp'] as $server)
{
if (!isset($hosts[$server['hostname']]))
{
$hosts[$server['hostname']] = array('username' => $server['username']);
}
if (strtoupper($server['socketType']) == 'SSL') // try TLS first
{
$hosts[$server['hostname']]['TLS'] = $server['port'];
}
$hosts[$server['hostname']][strtoupper($server['socketType'])] = $server['port'];
// make sure we prefer SSL over STARTTLS over insecure
if (count($hosts[$server['hostname']]) > 2)
{
$hosts[$server['hostname']] = self::fix_ssl_order($hosts[$server['hostname']]);
}
}
}
else
{
$hosts = $this->guess_hosts($content['ident_email'], 'smtp');
}
foreach($hosts as $host => $data)
{
$content['acc_smtp_host'] = $host;
if (!is_array($data))
{
$data = array('TLS' => 465, 'SSL' => 465, 'STARTTLS' => 587, '' => 25);
}
foreach($data as $ssl => $port)
{
if ($ssl === 'username') continue;
$content['acc_smtp_ssl'] = (int)self::$ssl2type[$ssl];
$e = null;
try {
$content['smtp_output'] .= "\n".egw_time::to('now', 'H:i:s').": Trying $ssl connection to $host:$port ...\n";
$content['acc_smtp_port'] = $port;
$mail = new Horde_Mail_Transport_Smtphorde($params=array(
'username' => $content['acc_smtp_username'],
'password' => $content['acc_smtp_password'],
'host' => $content['acc_smtp_host'],
'port' => $content['acc_smtp_port'],
'secure' => self::$ssl2secure[(string)array_search($content['acc_smtp_ssl'], self::$ssl2type)],
'timeout' => self::TIMEOUT,
'debug' => self::DEBUG_LOG,
));
// create smtp connection and authenticate, if credentials given
$smtp = $mail->getSMTPObject();
$content['smtp_output'] .= "\n".lang('Successful connected to %1 server%2.', 'SMTP',
(!empty($content['acc_smtp_username']) ? ' '.lang('and logged in') : ''))."\n";
if (!$smtp->isSecureConnection())
{
if (!empty($content['acc_smtp_username']))
{
$content['smtp_output'] .= lang('Connection is NOT secure! Everyone can read eg. your credentials.')."\n";
}
$content['acc_smtp_ssl'] = 'no';
}
// Horde_Smtp always try to use STARTTLS, adjust our ssl-parameter if successful
elseif (!($content['acc_smtp_ssl'] > self::SSL_NONE))
{
//error_log(__METHOD__."() new Horde_Mail_Transport_Smtphorde(".array2string($params).")->getSMTPObject()->isSecureConnection()=".array2string($smtp->isSecureConnection()));
$content['acc_smtp_ssl'] = self::SSL_STARTTLS;
}
// try sending a mail to a different domain, if not authenticated, to see if that's required
if (empty($content['acc_smtp_username']))
{
$smtp->send($content['ident_email'], 'noreply@example.com', '');
$content['smtp_output'] .= "\n".lang('Relay access checked')."\n";
}
$content['smtp_connected'] = true;
unset($content['button']);
return $this->edit($content, lang('Successful connected to %1 server%2.', 'SMTP',
empty($content['acc_smtp_username']) ? ' - '.lang('Relay access checked') : ' '.lang('and logged in')));
}
// unfortunately LOGIN_AUTHENTICATIONFAILED and SERVER_CONNECT are thrown as Horde_Mail_Exception
// while others are thrown as Horde_Smtp_Exception --> using common base Horde_Exception_Wrapped
catch(Horde_Exception_Wrapped $e)
{
switch($e->getCode())
{
case Horde_Smtp_Exception::LOGIN_AUTHENTICATIONFAILED:
case Horde_Smtp_Exception::LOGIN_REQUIREAUTHENTICATION:
case Horde_Smtp_Exception::UNSPECIFIED:
$content['smtp_output'] .= "\n".$e->getMessage()."\n";
break;
case Horde_Smtp_Exception::SERVER_CONNECT:
$content['smtp_output'] .= "\n".$e->getMessage()."\n";
break;
default:
$content['smtp_output'] .= "\n".$e->getMessage().' ('.$e->getCode().')'."\n";
break;
}
if (self::$debug) _egw_log_exception($e);
}
catch(Horde_Smtp_Exception $e)
{
// prever $e->details over $e->getMessage() as it contains original message from SMTP server (eg. relay access denied)
$content['smtp_output'] .= "\n".(empty($e->details) ? $e->getMessage().' ('.$e->getCode().')' : $e->details)."\n";
//$content['smtp_output'] .= $e->getTraceAsString()."\n";
if (self::$debug) _egw_log_exception($e);
}
catch(Exception $e) {
$content['smtp_output'] .= "\n".get_class($e).': '.$e->getMessage().' ('.$e->getCode().')'."\n";
//$content['smtp_output'] .= $e->getTraceAsString()."\n";
if (self::$debug) _egw_log_exception($e);
}
}
}
}
// add validation error, if we can identify a field
if (!$content['smtp_connected'] && $e instanceof Horde_Exception_Wrapped)
{
switch($e->getCode())
{
case Horde_Smtp_Exception::LOGIN_AUTHENTICATIONFAILED:
case Horde_Smtp_Exception::LOGIN_REQUIREAUTHENTICATION:
case Horde_Smtp_Exception::UNSPECIFIED:
etemplate_new::set_validation_error('acc_smtp_username', lang($e->getMessage()));
etemplate_new::set_validation_error('acc_smtp_password', lang($e->getMessage()));
break;
case Horde_Smtp_Exception::SERVER_CONNECT:
etemplate_new::set_validation_error('acc_smtp_host', lang($e->getMessage()));
etemplate_new::set_validation_error('acc_smtp_port', lang($e->getMessage()));
break;
}
}
$sel_options['acc_smtp_ssl'] = self::$ssl_types;
$tpl = new etemplate_new('emailadmin.wizard.smtp');
$tpl->exec(static::APP_CLASS.'smtp', $content, $sel_options, $readonlys, $content, 2);
}
/**
* Edit mail account(s)
*
* Gets either called with GET parameter:
*
* a) account_id from admin >> Manage users to edit / add mail accounts for a user
* --> shows selectbox to switch between different mail accounts of user and "create new account"
*
* b) via mail_wizard proxy class by regular mail user to edit (acc_id GET parameter) or create new mail account
*
* @param array $content =null
* @param string $msg =''
* @param string $msg_type ='success'
*/
public function edit(array $content=null, $msg='', $msg_type='success')
{
// app is trying to tell something, while redirecting to wizard
if (empty($content) && $_GET['acc_id'] && empty($msg) && !empty( $_GET['msg']))
{
if (stripos($_GET['msg'],'fatal error:')!==false || $_GET['msg_type'] == 'error') $msg_type = 'error';
}
if ($content['acc_id'] || (isset($_GET['acc_id']) && (int)$_GET['acc_id'] > 0) ) emailadmin_imapbase::unsetCachedObjects($content['acc_id']?$content['acc_id']:$_GET['acc_id']);
$tpl = new etemplate_new('emailadmin.account');
if (!is_array($content) || !empty($content['acc_id']) && isset($content['old_acc_id']) && $content['acc_id'] != $content['old_acc_id'])
{
if (!is_array($content)) $content = array();
if ($this->is_admin && isset($_GET['account_id']))
{
$content['called_for'] = (int)$_GET['account_id'];
$content['accounts'] = iterator_to_array(emailadmin_account::search($content['called_for']));
if ($content['accounts'])
{
list($content['acc_id']) = each($content['accounts']);
}
if (!$content['accounts']) // no email account, call wizard
{
return $this->add(array('account_id' => (int)$_GET['account_id']));
}
$content['accounts']['new'] = lang('Create new account');
}
if (isset($_GET['acc_id']) && (int)$_GET['acc_id'] > 0)
{
$content['acc_id'] = (int)$_GET['acc_id'];
}
// clear current account-data, as account has changed and we going to read selected one
$content = array_intersect_key($content, array_flip(array('called_for', 'accounts', 'acc_id', 'tabs')));
if ($content['acc_id'] > 0)
{
try {
$account = emailadmin_account::read($content['acc_id'], $this->is_admin && $content['called_for'] ?
$content['called_for'] : $GLOBALS['egw_info']['user']['account_id']);
$account->getUserData(); // quota, aliases, forwards etc.
$content += $account->params;
$content['acc_sieve_enabled'] = (string)($content['acc_sieve_enabled']);
$content['notify_use_default'] = !$content['notify_account_id'];
self::fix_account_id_0($content['account_id']);
// read identities (of current user) and mark std identity
$content['identities'] = iterator_to_array($account->identities());
$content['std_ident_id'] = $content['ident_id'];
$content['identities'][$content['std_ident_id']] = lang('Standard identity');
// change self::SSL_NONE (=0) to "no" used in sel_options
foreach(array('imap','smtp','sieve') as $type)
{
if (!$content['acc_'.$type.'_ssl']) $content['acc_'.$type.'_ssl'] = 'no';
}
}
catch(egw_exception_not_found $e) {
if (self::$debug) _egw_log_exception($e);
egw_framework::window_close(lang('Account not found!'));
}
catch(Exception $e) {
if (self::$debug) _egw_log_exception($e);
egw_framework::window_close($e->getMessage().' ('.get_class($e).': '.$e->getCode().')');
}
}
elseif ($content['acc_id'] === 'new')
{
$content['account_id'] = $content['called_for'];
$content['old_acc_id'] = $content['acc_id']; // to not call add/wizard, if we return from to
unset($content['tabs']);
return $this->add($content);
}
}
// some defaults for new accounts
if (!isset($content['account_id']) || empty($content['acc_id']) || $content['acc_id'] === 'new')
{
if (!isset($content['account_id'])) $content['account_id'] = array($GLOBALS['egw_info']['user']['account_id']);
$content['acc_user_editable'] = $content['acc_further_identities'] = true;
$readonlys['ident_id'] = true; // need to create standard identity first
}
if (empty($content['acc_name']))
{
$content['acc_name'] = $content['ident_email'];
}
// disable some stuff for non-emailadmins (all values are preserved!)
if (!$this->is_admin)
{
$readonlys = array(
'account_id' => true, 'button[multiple]' => true, 'acc_user_editable' => true,
'acc_further_identities' => true,
'acc_imap_type' => true, 'acc_imap_logintype' => true, 'acc_domain' => true,
'acc_imap_admin_username' => true, 'acc_imap_admin_password' => true,
'acc_smtp_type' => true, 'acc_smtp_auth_session' => true,
);
}
// ensure correct values for single user mail accounts (we only hide them client-side)
if (!($is_multiple = emailadmin_account::is_multiple($content)))
{
$content['acc_imap_type'] = 'emailadmin_imap';
unset($content['acc_imap_login_type']);
$content['acc_smtp_type'] = 'emailadmin_smtp';
unset($content['acc_smtp_auth_session']);
unset($content['notify_use_default']);
}
$edit_access = emailadmin_account::check_access(EGW_ACL_EDIT, $content);
// disable notification save-default and use-default, if only one account or no edit-rights
$tpl->disableElement('notify_save_default', !$is_multiple || !$edit_access);
$tpl->disableElement('notify_use_default', !$is_multiple);
if (isset($content['button']))
{
list($button) = each($content['button']);
unset($content['button']);
switch($button)
{
case 'wizard':
// if we just came from wizard, go back to last page/step
if (isset($content['smtp_connected']))
{
return $this->smtp($content);
}
// otherwise start with first step
return $this->autoconfig($content);
case 'delete_identity':
// delete none-standard identity of current user
if ($content['acc_further_identities'] && $content['ident_id'] > 0 &&
$content['std_ident_id'] != $content['ident_id'])
{
emailadmin_account::delete_identity($content['ident_id']);
$msg = lang('Identity deleted');
unset($content['identities'][$content['ident_id']]);
$content['ident_id'] = $content['std_ident_id'];
}
break;
case 'save':
case 'apply':
try {
// save none-standard identity for current user
if ($content['acc_id'] && $content['acc_id'] !== 'new' &&
$content['acc_further_identities'] &&
$content['std_ident_id'] != $content['ident_id'])
{
$content['ident_id'] = emailadmin_account::save_identity(array(
'account_id' => $GLOBALS['egw_info']['user']['account_id'],
)+$content);
$content['identities'][$content['ident_id']] = emailadmin_account::identity_name($content);
$msg = lang('Identity saved.');
if ($edit_access) $msg .= ' '.lang('Switch back to standard identity to save account.');
}
elseif ($edit_access)
{
// if admin username/password given, check if it is valid
$account = new emailadmin_account($content);
if ($account->acc_imap_administration)
{
$imap = $account->imapServer(true);
if ($imap) $imap->checkAdminConnection();
}
// test sieve connection, if not called for other user, enabled and credentials available
if (!$content['called_for'] && $account->acc_sieve_enabled && $account->acc_imap_username)
{
$account->imapServer()->retrieveRules();
}
$new_account = !($content['acc_id'] > 0);
// check for deliveryMode="forwardOnly", if a forwarding-address is given
if ($content['acc_smtp_type'] != 'emailadmin_smtp' &&
$content['deliveryMode'] == emailadmin_smtp::FORWARD_ONLY &&
empty($content['mailForwardingAddress']))
{
etemplate_new::set_validation_error('mailForwardingAddress', lang('Field must not be empty !!!'));
throw new egw_exception_wrong_userinput(lang('You need to specify a forwarding address, when checking "%1"!', lang('Forward only')));
}
// set notifications to store according to checkboxes
if ($content['notify_save_default'])
{
$content['notify_account_id'] = 0;
}
elseif (!$content['notify_use_default'])
{
$content['notify_account_id'] = $content['called_for'] ?
$content['called_for'] : $GLOBALS['egw_info']['user']['account_id'];
}
self::fix_account_id_0($content['account_id'], true);
$content = emailadmin_account::write($content, $content['called_for'] || !$this->is_admin ?
$content['called_for'] : $GLOBALS['egw_info']['user']['account_id']);
self::fix_account_id_0($content['account_id']);
$msg = lang('Account saved.');
// user wants default notifications
if ($content['acc_id'] && $content['notify_use_default'])
{
// delete own ones
emailadmin_notifications::delete($content['acc_id'], $content['called_for'] ?
$content['called_for'] : $GLOBALS['egw_info']['user']['account_id']);
// load default ones
$content = array_merge($content, emailadmin_notifications::read($content['acc_id'], 0));
}
// add new std identity entry
if ($new_account)
{
$content['std_ident_id'] = $content['ident_id'];
$content['identities'] = array(
$content['std_ident_id'] => lang('Standard identity'));
}
if (isset($content['accounts']))
{
if (!isset($content['accounts'][$content['acc_id']])) // insert new account as top, not bottom
{
$content['accounts'] = array($content['acc_id'] => '') + $content['accounts'];
}
$content['accounts'][$content['acc_id']] = emailadmin_account::identity_name($content, false);
}
}
else
{
if ($content['notify_use_default'] && $content['notify_account_id'])
{
// delete own ones
if (emailadmin_notifications::delete($content['acc_id'], $content['called_for'] ?
$content['called_for'] : $GLOBALS['egw_info']['user']['account_id']))
{
$msg = lang('Notification folders updated.');
}
// load default ones
$content = array_merge($content, emailadmin_notifications::read($content['acc_id'], 0));
}
if (!$content['notify_use_default'])
{
$content['notify_account_id'] = $content['called_for'] ?
$content['called_for'] : $GLOBALS['egw_info']['user']['account_id'];
if (emailadmin_notifications::write($content['acc_id'], $content['notify_account_id'],
$content['notify_folders']))
{
$msg = lang('Notification folders updated.');
}
}
}
}
catch (Horde_Imap_Client_Exception $e)
{
_egw_log_exception($e);
$tpl->set_validation_error('acc_imap_admin_username', $msg=lang($e->getMessage()));
$msg_type = 'error';
$content['tabs'] = 'emailadmin.account.imap'; // should happen automatic
break;
}
catch (PEAR_Exception $e)
{
_egw_log_exception($e);
$tpl->set_validation_error('acc_sieve_port', $msg=lang($e->getMessage()));
$msg_type = 'error';
$content['tabs'] = 'emailadmin.account.sieve'; // should happen automatic
break;
}
catch (Exception $e) {
$msg = lang('Error saving account!')."\n".$e->getMessage();
$button = 'apply';
$msg_type = 'error';
}
if ($content['acc_id']) emailadmin_imapbase::unsetCachedObjects($content['acc_id']);
if (stripos($msg,'fatal error:')!==false) $msg_type = 'error';
egw_framework::refresh_opener($msg, 'emailadmin', $content['acc_id'], $new_account ? 'add' : 'update', null, null, null, $msg_type);
if ($button == 'save') egw_framework::window_close();
break;
case 'delete':
if (!emailadmin_account::check_access(EGW_ACL_DELETE, $content))
{
$msg = lang('Permission denied!');
$msg_type = 'error';
}
elseif (emailadmin_account::delete($content['acc_id']) > 0)
{
if ($content['acc_id']) emailadmin_imapbase::unsetCachedObjects($content['acc_id']);
egw_framework::refresh_opener(lang('Account deleted.'), 'emailadmin', $content['acc_id'], 'delete');
egw_framework::window_close();
}
else
{
$msg = lang('Failed to delete account!');
$msg_type = 'error';
}
}
}
// disable delete button for new, not yet saved entries, if no delete rights or a non-standard identity selected
$readonlys['button[delete]'] = empty($content['acc_id']) ||
!emailadmin_account::check_access(EGW_ACL_DELETE, $content) ||
$content['ident_id'] != $content['std_ident_id'];
// if account is for multiple user, change delete confirmation to reflect that
if (emailadmin_account::is_multiple($content))
{
$tpl->setElementAttribute('button[delete]', 'onclick', "et2_dialog.confirm(widget,'This is NOT a personal mail account!\\n\\nAccount will be deleted for ALL users!\\n\\nAre you really sure you want to do that?','Delete this account')");
}
// if no edit access, make whole dialog readonly
if (!$edit_access)
{
$readonlys['__ALL__'] = true;
$readonlys['button[cancel]'] = false;
// allow to edit notification-folders
$readonlys['button[save]'] = $readonlys['button[apply]'] =
$readonlys['notify_folders'] = $readonlys['notify_use_default'] = false;
}
$sel_options['acc_imap_ssl'] = $sel_options['acc_sieve_ssl'] =
$sel_options['acc_smtp_ssl'] = self::$ssl_types;
// admin access to account with no credentials available
if ($this->is_admin && (empty($content['acc_imap_username']) || empty($content['acc_imap_host'])))
{
// cant connection to imap --> allow free entries in taglists
foreach(array('acc_folder_sent', 'acc_folder_trash', 'acc_folder_draft', 'acc_folder_template', 'acc_folder_junk') as $folder)
{
$tpl->setElementAttribute($folder, 'allowFreeEntries', true);
}
}
else
{
try {
$sel_options['acc_folder_sent'] = $sel_options['acc_folder_trash'] =
$sel_options['acc_folder_draft'] = $sel_options['acc_folder_template'] =
$sel_options['acc_folder_junk'] = $sel_options['notify_folders'] =
self::mailboxes(self::imap_client ($content));
}
catch(Exception $e) {
// let user know what the problem is and that he can fix it using wizard or deleting
$msg = lang($e->getMessage())."\n\n".lang('You can use wizard to fix account settings or delete account.');
$msg_type = 'error';
// cant connection to imap --> allow free entries in taglists
foreach(array('acc_folder_sent', 'acc_folder_trash', 'acc_folder_draft', 'acc_folder_template', 'acc_folder_junk') as $folder)
{
$tpl->setElementAttribute($folder, 'allowFreeEntries', true);
}
}
}
$sel_options['acc_imap_type'] = emailadmin_base::getIMAPServerTypes(false);
$sel_options['acc_smtp_type'] = emailadmin_base::getSMTPServerTypes(false);
$sel_options['acc_imap_logintype'] = self::$login_types;
$sel_options['ident_id'] = $content['identities'];
$sel_options['acc_id'] = $content['accounts'];
// user is allowed to create or edit further identities
if ($edit_access || $content['acc_further_identities'])
{
$sel_options['ident_id']['new'] = lang('Create new identity');
$readonlys['ident_id'] = false;
// if no edit-access and identity is not standard identity --> allow to edit identity
if (!$edit_access && $content['ident_id'] != $content['std_ident_id'])
{
$readonlys += array(
'button[save]' => false, 'button[apply]' => false,
'button[placeholders]' => false,
'ident_name' => false,
'ident_realname' => false, 'ident_email' => false,
'ident_org' => false, 'ident_signature' => false,
);
}
if ($content['ident_id'] != $content['old_ident_id'] &&
($content['old_ident_id'] || $content['ident_id'] != $content['std_ident_id']))
{
if ($content['ident_id'] > 0)
{
$identity = emailadmin_account::read_identity($content['ident_id']);
unset($identity['account_id']);
$content = array_merge($content, $identity);
}
else
{
$content['ident_name'] = $content['ident_realname'] = $content['ident_email'] =
$content['ident_org'] = $content['ident_signature'] = '';
}
if (empty($msg) && $edit_access && $content['ident_id'] && $content['ident_id'] != $content['std_ident_id'])
{
$msg = lang('Switch back to standard identity to save other account data.');
$msg_type = 'help';
}
$content['old_ident_id'] = $content['ident_id'];
}
}
$content['old_acc_id'] = $content['acc_id'];
// only allow to delete further identities, not a standard identity
$readonlys['button[delete_identity]'] = !($content['ident_id'] > 0 && $content['ident_id'] != $content['std_ident_id']);
// disable aliases tab for default smtp class emailadmin_smtp
$readonlys['tabs']['emailadmin.account.aliases'] = !$content['acc_smtp_type'] ||
$content['acc_smtp_type'] == 'emailadmin_smtp';
// allow imap classes to disable certain tabs or fields
if (($class = emailadmin_account::getIcClass($content['acc_imap_type'])) && class_exists($class) &&
($imap_ro = call_user_func(array($class, 'getUIreadonlys'))))
{
$readonlys = array_merge($readonlys, $imap_ro, array(
'tabs' => array_merge((array)$readonlys['tabs'], (array)$imap_ro['tabs']),
));
}
egw_framework::message($msg ? $msg : (string)$_GET['msg'], $msg_type);
if (count($content['account_id']) > 1)
{
$tpl->setElementAttribute('account_id', 'multiple', true);
$readonlys['button[multiple]'] = true;
}
// when called by admin for existing accounts, display further administrative actions
if ($content['called_for'] && $content['acc_id'])
{
$admin_actions = array();
foreach($GLOBALS['egw']->hooks->process(array(
'location' => 'emailadmin_edit',
'account_id' => $content['called_for'],
'acc_id' => $content['acc_id'],
)) as $actions)
{
if ($actions) $admin_actions = array_merge($admin_actions, $actions);
}
if ($admin_actions) $tpl->setElementAttribute('admin_actions', 'actions', $admin_actions);
}
$content['admin_actions'] = (bool)$admin_actions;
$tpl->exec(static::APP_CLASS.'edit', $content, $sel_options, $readonlys, $content, 2);
}
/**
* Replace 0 with '' or back
*
* @param string|array &$account_id on return always array
* @param boolean $back =false
*/
private static function fix_account_id_0(&$account_id=null, $back=false)
{
if (!isset($account_id)) return;
if (!is_array($account_id))
{
$account_id = explode(',', $account_id);
}
if (($k = array_search($back?'':'0', $account_id)) !== false)
{
$account_id[$k] = $back ? '0' : '';
}
}
/**
* Instanciate imap-client
*
* @param array $content
* @param int $timeout =null default use value returned by emailadmin_imap::getTimeOut()
* @return Horde_Imap_Client_Socket
*/
protected static function imap_client(array $content, $timeout=null)
{
return new Horde_Imap_Client_Socket(array(
'username' => $content['acc_imap_username'],
'password' => $content['acc_imap_password'],
'hostspec' => $content['acc_imap_host'],
'port' => $content['acc_imap_port'],
'secure' => self::$ssl2secure[(string)array_search($content['acc_imap_ssl'], self::$ssl2type)],
'timeout' => $timeout > 0 ? $timeout : emailadmin_imap::getTimeOut(),
'debug' => self::DEBUG_LOG,
));
}
/**
* Reorder SSL types to make sure we start with TLS, SSL, STARTTLS and insecure last
*
* @param array $data ssl => port pairs plus other data like value for 'username'
* @return array
*/
protected static function fix_ssl_order($data)
{
$ordered = array();
foreach(array_merge(array('TLS', 'SSL', 'STARTTLS'), array_keys($data)) as $key)
{
if (array_key_exists($key, $data)) $ordered[$key] = $data[$key];
}
return $ordered;
}
/**
* Query Mozilla's ISPDB
*
* Some providers eg. 1-and-1 do not report their hosted domains to ISPDB,
* therefore we try it with the found MX and it's domain-part (host-name removed).
*
* @param string $domain domain or email
* @param boolean $try_mx =true if domain itself is not found, try mx or domain-part (host removed) of mx
* @return array with values for keys 'displayName', 'imap', 'smtp', 'pop3', which each contain
* array of arrays with values for keys 'hostname', 'port', 'socketType'=(SSL|STARTTLS), 'username'=%EMAILADDRESS%
*/
protected static function mozilla_ispdb($domain, $try_mx=true)
{
if (strpos($domain, '@') !== false) list(,$domain) = explode('@', $domain);
$url = 'https://autoconfig.thunderbird.net/v1.1/'.$domain;
try {
$xml = @simplexml_load_file($url);
if (!$xml->emailProvider) throw new egw_exception_not_found();
$provider = array(
'displayName' => (string)$xml->emailProvider->displayName,
);
foreach($xml->emailProvider->children() as $tag => $server)
{
if (!in_array($tag, array('incomingServer', 'outgoingServer'))) continue;
foreach($server->attributes() as $name => $value)
{
if ($name == 'type') $type = (string)$value;
}
$data = array();
foreach($server as $name => $value)
{
foreach($value->children() as $tag => $val)
{
$data[$name][$tag] = (string)$val;
}
if (!isset($data[$name])) $data[$name] = (string)$value;
}
$provider[$type][] = $data;
}
}
catch(Exception $e) {
// ignore own not-found exception or xml parsing execptions
unset($e);
if ($try_mx && ($dns = dns_get_record($domain, DNS_MX)))
{
$domain = $dns[0]['target'];
if (!($provider = self::mozilla_ispdb($domain, false)))
{
list(,$domain) = explode('.', $domain, 2);
$provider = self::mozilla_ispdb($domain, false);
}
}
else
{
$provider = array();
}
}
//error_log(__METHOD__."('$email') returning ".array2string($provider));
return $provider;
}
/**
* Guess possible server hostnames from email address:
* - $type.$domain, mail.$domain
* - replace host in MX with imap or mail
* - MX for $domain
*
* @param string $email email address
* @param string $type ='imap' 'imap' or 'smtp', used as hostname beside 'mail'
* @return array of hostname => true pairs
*/
protected function guess_hosts($email, $type='imap')
{
list(,$domain) = explode('@', $email);
$hosts = array();
// try usuall names
$hosts[$type.'.'.$domain] = true;
$hosts['mail.'.$domain] = true;
if ($type == 'smtp') $hosts['send.'.$domain] = true;
if (($dns = dns_get_record($domain, DNS_MX)))
{
//error_log(__METHOD__."('$email') dns_get_record('$domain', DNS_MX) returned ".array2string($dns));
$hosts[preg_replace('/^[^.]+/', $type, $dns[0]['target'])] = true;
$hosts[preg_replace('/^[^.]+/', 'mail', $dns[0]['target'])] = true;
if ($type == 'smtp') $hosts[preg_replace('/^[^.]+/', 'send', $dns[0]['target'])] = true;
$hosts[$dns[0]['target']] = true;
}
// verify hosts in dns
foreach(array_keys($hosts) as $host)
{
if (!dns_get_record($host, DNS_A)) unset($hosts[$host]);
}
//error_log(__METHOD__."('$email') returning ".array2string($hosts));
return $hosts;
}
}
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