使用SMTP发送邮件

简介：这是使用SMTP发送邮件的详细页面，介绍了和php,有关的知识、技巧、经验，和一些php源码等。
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$params = array (
	'SmtpServer' => 'mail.XXX.com',
	'SmtpAuth' => '1',
	'SmtpUser' => 'system@XXX.com',
	'SmtpPassword' => 'XXX',
	'SystemMailer' => 'Cor Inc.',
	'SystemMailAddress' => 'system@XXX.com',
);
define("MAIL_SMTP_SERVER", $params['SmtpServer']);
define("MAIL_AUTH", $params['SmtpAuth']);
define("MAIL_USERNAME", $params['SmtpUser']);
define("MAIL_PASSWORD", $params['SmtpPassword']);
define('SYSTEM_MAILER', $params['SystemMailer']);
define("SUPPORT_EMAIL",$params['SystemMailAddress']);

/**
 * 通过SMTP发送邮件
 *
 * @param array $to 
 * 例 array("will"=>"will@126.com") 数组key值为收件人姓名,数组value值为收件人邮件地址, 可同时多个收件人;
 * @param string $from_name 发件人姓名
 * @param string $from 发件人邮件地址
 * @param string $subject 邮件主题
 * @param string $message 邮件内容 注：支持HTML
 * @param string $charset 邮件编码 默认指定为gbk
 * @return int
 * 返回值 0 为发送成功, 非0时为发送失败.
 */
function SendMail($to, $from_name,$from, $subject, $message , $charset="gbk")
{
	//发送邮件
    if(!$from_name) $from_name = SYSTEM_MAILER;
    if(!$from) $from = SUPPORT_EMAIL;
	if( SYSTEM_MAILER && function_exists('mail'))//使用sendmail组件发送邮件
	{
		$message = str_replace("\r", '', $message);	
		if(!is_array($to))  return -7;
		foreach($to as $key=>$email)
		{   
			if($email)
			{
				@mail($email, $subject, $message, "From: $from");						
			}           			
		}
		
	}
	else //使用SMTP发送邮件
	{	
		//return SmtpSendMail($tmp, $from_name,$from, $subject, $message, $charset);
		//大量邮件群发
		if(is_array($to)){
			foreach($to as $key=>$value){
				$tmp[$key]=$value;
				if(count($tmp)==10){
					$result[]=SmtpSendMail($tmp, $from_name,$from, $subject, $message, $charset);
					$tmp="";
				}				
			}
			if($tmp){
				return SmtpSendMail($tmp, $from_name,$from, $subject, $message, $charset);
			}else{
				return array_pop($result);
			}
		}else{
			return -7;
		}
	}		
 	return 0;
}
function SmtpSendMail($to, $from_name,$from, $subject, $message, $charset="gbk")
{
	$smtp = explode(":",MAIL_SMTP_SERVER);
	$check = MAIL_AUTH;

    $smtp_host = $smtp[0];
    $smtp_port = $smtp[1] ? $smtp[1] : 25;

    $mail_debug = $GLOBALS['queue_debug'];

	if ($check) {
		$username = MAIL_USERNAME;
		$password = MAIL_PASSWORD;
	}
	
	$s_from = SUPPORT_EMAIL;

  	$fp = @fsockopen ($smtp_host, $smtp_port, $errno, $errstr, 10); 

 	if (!$fp ) return -1;

    if(function_exists("stream_set_blocking")){
        stream_set_blocking($fp, true);
    } else {
        set_socket_blocking($fp, true ); 
    }

    stream_set_timeout($fp,10);
 	
	$lastmessage=fgets($fp,512);
    
    //调式信息
    if($mail_debug){
        echo $lastmessage."\r\n";
    }

	if ( substr($lastmessage,0,3) != 220 ) return -1; 

 	$yourname = "YOURNAME";
 	if($check == "1") $lastact="HELO ".$yourname."\r\n";
	else $lastact="HELO ".$yourname."\r\n";
	
	fputs($fp, $lastact);
	$lastmessage == fgets($fp,512);

    //调式信息
    if($mail_debug){
        echo $lastact;
        echo $lastmessage;
    }

	if (substr($lastmessage,0,3) != 220 ) return -2;

	if ($check=="1") {
		$lastact="AUTH LOGIN"."\r\n";
		fputs( $fp, $lastact);
		$lastmessage = fgets ($fp,512);

        //调式信息
        if($mail_debug){
            echo $lastact;
            echo $lastmessage;
        }

		if (substr($lastmessage,0,3) != 334) return -3; 
		$lastact=base64_encode($username)."\r\n";
		fputs( $fp, $lastact);
		$lastmessage = fgets ($fp,512);

                //调式信息
        if($mail_debug){
            echo $lastact;
            echo $lastmessage;
        }

		if (substr($lastmessage,0,3) != 334) return -4;
		$lastact=base64_encode($password)."\r\n";
		fputs( $fp, $lastact);
		$lastmessage = fgets ($fp,512);

                //调式信息
        if($mail_debug){
            echo $lastact;
            echo $lastmessage;
        }

		if (substr($lastmessage,0,3) != "235") return -5;
	}
	
	$lastact="MAIL FROM: <$s_from>\r\n"; 
	fputs( $fp, $lastact);
	$lastmessage = fgets ($fp,512);

        //调式信息
    if($mail_debug){
        echo $lastact;
        echo $lastmessage;
    }

	if (substr($lastmessage,0,3) != 250) return -6;
	$i=0;
	if(is_array($to)){
		foreach($to as $key=>$email){
			if($email){
                $lastact = "RCPT TO: <$email>\r\n";
				fputs( $fp, $lastact);
				$lastmessage = fgets ($fp,512);

                //调式信息
                if($mail_debug){
                    echo $lastact;
                    echo $lastmessage;
                }

				if (substr($lastmessage,0,3) == 250){
					//return -7;
					$i++;
				}
				$tomails[]="$key<$email>";
			}
		}
		if($i<1) return -7;
	}
	else{
		return -7;
	}
	$lastact="DATA\r\n";
	fputs($fp, $lastact);
	$lastmessage = fgets ($fp,512);

    //调式信息
    if($mail_debug){
        echo $lastact;
        echo $lastmessage;
    }

	if (substr($lastmessage,0,3) != 354) return -8;

    $head    .=    "MIME-Version: 1.0\r\n";
    $head    .=    "Content-type: text/html; charset=$charset\r\n";	
 	$head    .=    "Subject: $subject\r\n"; 
	$message = $head."\r\n".$message; 
 	 
 
  	$head="From: \"".$from_name."\" <$from>\r\n"; 
	$message = $head.$message; 
  
  	//$head="To: \"".$to_name."\" <$to>\r\n";
  	$head="To: ".implode(",",$tomails)."\r\n";
 	$message = $head.$message;
 	 
   	$message .= "\r\n.\r\n";
 	
  	fputs($fp, $message); 

        //调式信息
    if($mail_debug){
        $lastmessage = fgets ($fp,512);
        echo $head;
        echo $lastmessage;
    }

 	$lastact="QUIT\r\n"; 
	
	fputs($fp,$lastace); 
 	fclose($fp); 
 	return 0;
}