DiscuzX/upload/uc_server/lib/sendmail.inc.php

<?php

/*
	[UCenter] (C)2001-2099 Comsenz Inc.
	This is NOT a freeware, use is subject to license terms

	$Id: sendmail.inc.php 1124 2011-12-06 11:03:23Z svn_project_zhangjie $
*/

!defined('IN_UC') && exit('Access Denied');

if($mail_setting['mailsilent']) {
	error_reporting(0);
}

$maildelimiter = $mail_setting['maildelimiter'] == 1 ? "\r\n" : ($mail_setting['maildelimiter'] == 2 ? "\r" : "\n");
$mailusername = isset($mail_setting['mailusername']) ? $mail_setting['mailusername'] : 1;
$appname = $this->base->cache['apps'][$mail['appid']]['name'];
$mail['subject'] = '=?'.$mail['charset'].'?B?'.base64_encode(str_replace("\r", '', str_replace("\n", '', '['.$appname.'] '.$mail['subject']))).'?=';
$mail['message'] = chunk_split(base64_encode(str_replace("\r\n.", " \r\n..", str_replace("\n", "\r\n", str_replace("\r", "\n", str_replace("\r\n", "\n", str_replace("\n\r", "\r", $mail['message'])))))));

$email_from = $mail['frommail'] == '' ? '=?'.$mail['charset'].'?B?'.base64_encode($appname)."?= <$mail_setting[maildefault]>" : (preg_match('/^(.+?) \<(.+?)\>$/',$email_from, $from) ? '=?'.$mail['charset'].'?B?'.base64_encode($from[1])."?= <$from[2]>" : $mail['frommail']);

foreach(explode(',', $mail['email_to']) as $touser) {
	$tousers[] = preg_match('/^(.+?) \<(.+?)\>$/',$touser, $to) ? ($mailusername ? '=?'.$mail['charset'].'?B?'.base64_encode($to[1])."?= <$to[2]>" : $to[2]) : $touser;
}

$mail['email_to'] = implode(',', $tousers);

$headers = "From: $email_from{$maildelimiter}X-Priority: 3{$maildelimiter}X-Mailer: Discuz! $version{$maildelimiter}MIME-Version: 1.0{$maildelimiter}Content-type: text/".($mail['htmlon'] ? 'html' : 'plain')."; charset=$mail[charset]{$maildelimiter}Content-Transfer-Encoding: base64{$maildelimiter}";

$mail_setting['mailport'] = $mail_setting['mailport'] ? $mail_setting['mailport'] : 25;

if($mail_setting['mailsend'] == 1 && function_exists('mail')) {

	 return @mail($mail['email_to'], $mail['subject'], $mail['message'], $headers);

} elseif($mail_setting['mailsend'] == 2) {

	if(!$fp = fsocketopen($mail_setting['mailserver'], $mail_setting['mailport'], $errno, $errstr, 30)) {
		return false;
	}

 	stream_set_blocking($fp, true);

	$lastmessage = fgets($fp, 512);
	if(substr($lastmessage, 0, 3) != '220') {
		return false;
	}

	fputs($fp, ($mail_setting['mailauth'] ? 'EHLO' : 'HELO')." discuz\r\n");
	$lastmessage = fgets($fp, 512);
	if(substr($lastmessage, 0, 3) != 220 && substr($lastmessage, 0, 3) != 250) {
		return false;
	}

	while(1) {
		if(substr($lastmessage, 3, 1) != '-' || empty($lastmessage)) {
 			break;
 		}
 		$lastmessage = fgets($fp, 512);
	}

	if($mail_setting['mailauth']) {
		fputs($fp, "AUTH LOGIN\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 334) {
			return false;
		}

		fputs($fp, base64_encode($mail_setting['mailauth_username'])."\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 334) {
			return false;
		}

		fputs($fp, base64_encode($mail_setting['mailauth_password'])."\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 235) {
			return false;
		}

		$email_from = $mail_setting['mailfrom'];
	}

	fputs($fp, "MAIL FROM: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $email_from).">\r\n");
	$lastmessage = fgets($fp, 512);
	if(substr($lastmessage, 0, 3) != 250) {
		fputs($fp, "MAIL FROM: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $email_from).">\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 250) {
			return false;
		}
	}

	$email_tos = array();
	foreach(explode(',', $mail['email_to']) as $touser) {
		$touser = trim($touser);
		if($touser) {
			fputs($fp, "RCPT TO: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $touser).">\r\n");
			$lastmessage = fgets($fp, 512);
			if(substr($lastmessage, 0, 3) != 250) {
				fputs($fp, "RCPT TO: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $touser).">\r\n");
				$lastmessage = fgets($fp, 512);
				return false;
			}
		}
	}

	fputs($fp, "DATA\r\n");
	$lastmessage = fgets($fp, 512);
	if(substr($lastmessage, 0, 3) != 354) {
		return false;
	}

	$headers .= 'Message-ID: <'.gmdate('YmdHs').'.'.substr(md5($mail['message'].microtime()), 0, 6).rand(100000, 999999).'@'.$_SERVER['HTTP_HOST'].">{$maildelimiter}";

	fputs($fp, "Date: ".gmdate('r')."\r\n");
	fputs($fp, "To: ".$mail['email_to']."\r\n");
	fputs($fp, "Subject: ".$mail['subject']."\r\n");
	fputs($fp, $headers."\r\n");
	fputs($fp, "\r\n\r\n");
	fputs($fp, "$mail[message]\r\n.\r\n");
	$lastmessage = fgets($fp, 512);
	if(substr($lastmessage, 0, 3) != 250) {
		return false;
	}

	fputs($fp, "QUIT\r\n");
	return true;

} elseif($mail_setting['mailsend'] == 3) {

	ini_set('SMTP', $mail_setting['mailserver']);
	ini_set('smtp_port', $mail_setting['mailport']);
	ini_set('sendmail_from', $email_from);

	return @mail($mail['email_to'], $mail['subject'], $mail['message'], $headers);

}

?>