php 发邮件的2种方式（使用stmp类、使用socket协议）

方式1:使用stmp类发送邮件

代码：

stmp.php

 <?php
 header("Content-Type: text/html; charset=utf-8");

 class smtp
 {
     /* Public Variables */
     var $smtp_port;
     var $time_out;
     var $host_name;
     var $log_file;
     var $relay_host;
     var $debug;
     var $auth;
     var $user;
     var $pass; 

     /* Private Variables */
     var $sock; 

     /* Constractor */
     function smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass)
     {
         $this->debug = FALSE;
         $this->smtp_port = $smtp_port;
         $this->relay_host = $relay_host;
         $this->time_out = 30; //is used in fsockopen()
         $this->auth = $auth;//auth
         $this->user = $user;
         $this->pass = $pass;
         $this->host_name = "localhost"; //is used in HELO command
         $this->log_file = "";
         $this->sock = FALSE;
 } 

     /* Main Function */
     function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")
     {
         $mail_from = $this->get_address($this->strip_comment($from));
         $body = preg_replace("/(^|(\r\n))(\.)/", "\1.\3", $body);
         $header = "MIME-Version:1.0\r\n";
         if($mailtype=="HTML")
         {
             $header .= "Content-Type:text/html\r\n";
         }
         $header .= "To: ".$to."\r\n";
         if ($cc != "")
         {
             $header .= "Cc: ".$cc."\r\n";
         }
         $header .= "From: $from<".$from.">\r\n";
         $header .= "Subject: ".$subject."\r\n";
         $header .= $additional_headers;
         $header .= "Date: ".date("r")."\r\n";
         $header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
         list($msec, $sec) = explode(" ", microtime());
         $header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\r\n";
         $TO = explode(",", $this->strip_comment($to)); 

         if ($cc != "")
         {
             $TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
             }
         if ($bcc != "")
         {
             $TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
         }
         $sent = TRUE;
         foreach ($TO as $rcpt_to)
         {
             $rcpt_to = $this->get_address($rcpt_to);
             if (!$this->smtp_sockopen($rcpt_to))
             {
                 $this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
                 $sent = FALSE;
                 continue;
             }
             if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body))
             {
                 $this->log_write("E-mail has been sent to <".$rcpt_to.">\n");
             }
             else
             {
                 $this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");
                 $sent = FALSE;
             }
             fclose($this->sock);
             $this->log_write("Disconnected from remote host\n");
         }
         return $sent;
     } 

     /* Private Functions */
     function smtp_send($helo, $from, $to, $header, $body = "")
     {
         if (!$this->smtp_putcmd("HELO", $helo))
         {
             return $this->smtp_error("sending HELO command");
         } 

         #auth
         if($this->auth)
         {
             if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user)))
             {
                 return $this->smtp_error("sending HELO command");
             }
             if (!$this->smtp_putcmd("", base64_encode($this->pass)))
             {
                 return $this->smtp_error("sending HELO command");
             }
         }
         if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">"))
         {
             return $this->smtp_error("sending MAIL FROM command");
         }
         if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">"))
         {
             return $this->smtp_error("sending RCPT TO command");
         }
         if (!$this->smtp_putcmd("DATA"))
         {
             return $this->smtp_error("sending DATA command");
         }
         if (!$this->smtp_message($header, $body))
         {
             return $this->smtp_error("sending message");
         }
         if (!$this->smtp_eom())
         {
             return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
         }
         if (!$this->smtp_putcmd("QUIT"))
         {
             return $this->smtp_error("sending QUIT command");
         }
         return TRUE;
     } 

     function smtp_sockopen($address)
     {
         if ($this->relay_host == "")
         {
             return $this->smtp_sockopen_mx($address);
         }
         else
         {
             return $this->smtp_sockopen_relay();
         }
     } 

     function smtp_sockopen_relay()
     {
         $this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
         $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
         if (!($this->sock && $this->smtp_ok()))
         {
             $this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
             $this->log_write("Error: ".$errstr." (".$errno.")\n");
             return FALSE;
         }
         $this->log_write("Connected to relay host ".$this->relay_host."\n");
         return TRUE;;
     } 

     function smtp_sockopen_mx($address)
     {
         $domain = preg_replace("^.+@([^@]+)$", "\1", $address);
         if (!@getmxrr($domain, $MXHOSTS))
         {
             $this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
             return FALSE;
         }
         foreach ($MXHOSTS as $host)
         {
             $this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
             $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
             if (!($this->sock && $this->smtp_ok()))
             {
                 $this->log_write("Warning: Cannot connect to mx host ".$host."\n");
                 $this->log_write("Error: ".$errstr." (".$errno.")\n");
                 continue;
             }
             $this->log_write("Connected to mx host ".$host."\n");
             return TRUE;
         }
         $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");
         return FALSE;
     } 

     function smtp_message($header, $body)
     {
         fputs($this->sock, $header."\r\n".$body);
         $this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));
         return TRUE;
     } 

     function smtp_eom()
     {
         fputs($this->sock, "\r\n.\r\n");
         $this->smtp_debug(". [EOM]\n");
         return $this->smtp_ok();
     } 

     function smtp_ok()
     {
         $response = str_replace("\r\n", "", fgets($this->sock, 512));
         $this->smtp_debug($response."\n");
         if (!preg_match("/^[23]/", $response))
         {
             fputs($this->sock, "QUIT\r\n");
             fgets($this->sock, 512);
             $this->log_write("Error: Remote host returned \"".$response."\"\n");
             return FALSE;
         }
         return TRUE;
     } 

     function smtp_putcmd($cmd, $arg = "")
     {
         if ($arg != "")
         {
             if($cmd=="")
             {
                 $cmd = $arg;
             }
             else
             {
                 $cmd = $cmd." ".$arg;
             }
         }
         fputs($this->sock, $cmd."\r\n");
         $this->smtp_debug("> ".$cmd."\n");
         return $this->smtp_ok();
     } 

     function smtp_error($string)
     {
         $this->log_write("Error: Error occurred while ".$string.".\n");
         return FALSE;
     } 

     function log_write($message)
     {
         $this->smtp_debug($message);
         if ($this->log_file == "")
         {
             return TRUE;
         }
         $message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
         if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a")))
         {
             $this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");
             return FALSE;;
         }
         flock($fp, LOCK_EX);
         fputs($fp, $message);
         fclose($fp);
         return TRUE;
     } 

     function strip_comment($address)
     {
         $comment = "/\([^()]*\)/";
         while (preg_match($comment, $address))
         {
             $address = preg_replace($comment, "", $address);
         }
         return $address;
     } 

     function get_address($address)
     {
         $address = preg_replace("/([ \t\r\n])+/", "", $address);
         $address = preg_replace("/^.*<(.+)>.*$/", "\1", $address);
         return $address;
     } 

     function smtp_debug($message)
     {
         if ($this->debug)
         {
             echo $message;
         }
     } 

 }
 ?>

sendCodeTest.php

 <?php
 header("Content-Type: text/html; charset=utf-8");

 //引入发送邮件类
 require("smtp.php");
 //使用163邮箱服务器
 $smtpserver = "smtp.163.com";
 //163邮箱服务器端口
 $smtpserverport = 25;
 //你的163服务器邮箱账号
 $smtpusermail = "18503001535@163.com";
 //收件人邮箱
 $smtpemailto = "244491216@qq.com";

 //你的邮箱账号(去掉@163.com)
 $smtpuser = "18503001535";//你的163邮箱去掉后面的163.com
 //你的邮箱密码
 $smtppass = "baomihua1234"; //你的163邮箱SMTP的授权码，千万不要填密码！！！

 //邮件主题
 $mailsubject = "测试邮件发送";
 //邮件内容
 $mailbody = "PHP+MySQL";
 //邮件格式（HTML/TXT）,TXT为文本邮件
 $mailtype = "TXT";
 //这里面的一个true是表示使用身份验证,否则不使用身份验证.
 $smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);
 //是否显示发送的调试信息
 $smtp->debug = TRUE;
 //发送邮件
 $smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype); 

 ?>

注意：

1. 该代码得设置邮箱得授权码，163邮箱设置得地方：设置-客户端授权密码-重新授权码
2. 使用这个发邮件，邮件可能会进入垃圾箱或者被拦截

方式2:使用socket协议发送邮件

sendMail.php

<?php
header("Content-Type:text/html;charset=utf8");
$content = <<<'html'
    <table style="width:100%;height:100%;">
    <tr><td style="text-align: center;">
        <div style="display: inline-block; padding:30px; color:red; ">
            <img src="https://ss0.bdstatic.com/5aV1bjqh_Q23odCf/static/superman/img/logo/bd_logo1_31bdc765.png"/>
            <h1>helloworld，这是一封测试邮件</h1>
            <a style="text-decoration: none; color: #ffffff" href="http://serverjs.cn" target="_blank">
                <div style="font-family:'微软雅黑';font-size: 18px; text-decoration: none; white-space: nowrap; color: #ffffff; padding-bottom: 10px; text-align: center; padding-top: 10px; padding-left: 25px; margin: 0px; padding-right: 25px; background-color: #cc0001; border-radius: 3px">马上激活 </div>
            </a>
        </div>
    </td></tr>
    </table>
html;
// $to = "15679700245@163.com";
$to = "18503001535@163.com";

echo sendMail("这是发件人", "admin@serverjs.cn", $to, "这是邮件标题", $content, true, "utf8");

function sendMail($senderName, $sender, $to, $subject, $content, $isHtml = false, $encode = "utf-8")
{
    date_default_timezone_set('Asia/Shanghai');
    $toHostname = substr($to, strrpos($to, '@') + 1);
    if (dns_get_mx($toHostname, $mxhosts, $weight)) {
        // $best = array_search(min($weight), $weight);
        // $mxBestHost = $mxhosts[$best];
        $socket = $res = $errno = $errstr = null;
        foreach ($mxhosts as $v) {
            $socket = @fsockopen($v, 25, $errno, $errstr, 10);
            if ($socket) {
                $res = fgets($socket);
                if ($res != 220) {
                    fclose($socket);
                    return $res;
                }
                break;
            }
        }
        if (! $socket) {
            return "$errstr ($errno)";
        }
        $senderHost = substr($sender, strrpos($sender, '@') + 1);
        fwrite($socket, "HELO $senderHost\r\n");
        fflush($socket);
        $res = fgets($socket);
        if ($res != 250) {
            fclose($socket);
            return $res;
        }

        fwrite($socket, "MAIL FROM: <$sender>\r\n");
        fflush($socket);
        $res = fgets($socket);
        if ($res != 250) {
            fclose($socket);
            return $res;
        }

        fwrite($socket, "RCPT TO: <$to>\r\n");
        fflush($socket);
        $res = fgets($socket);
        if ($res != 250) {
            fclose($socket);
            return $res;
        }

        fwrite($socket, "DATA\r\n");
        fflush($socket);
        $res = fgets($socket);
        if ($res != 354) {
            fclose($socket);
            return $res;
        }

        fwrite($socket, "From: =?$encode?B?" . base64_encode($senderName) . "?= <$sender>\r\n");
        fwrite($socket, "To: $to\r\n");
        fwrite($socket, "Subject: =?$encode?B?" . base64_encode($subject) . "?=\r\n");
        fwrite($socket, "Date: " . date(DATE_RFC822) . "\r\n");
        fwrite($socket, "MIME-Version: 1.0\r\n");
        if ($isHtml) {
            fwrite($socket, "Content-Type: text/html; charset=\"$encode\"\r\n");
        } else {
            fwrite($socket, "Content-Type: text/plain; charset=\"$encode\"\r\n");
        }
        fwrite($socket, "Content-Transfer-Encoding: base64\r\n");
        fwrite($socket, "X-Priority: 3\r\n");
        fwrite($socket, "X-Mailer: PHP Server\r\n");
        fwrite($socket, "\r\n");
        fwrite($socket, base64_encode($content));
        fwrite($socket, "\r\n.\r\n");
        fflush($socket);
        $res = fgets($socket);
        if ($res == 550) {
            fclose($socket);
            return "邮件被拦截: $res";
        } elseif ($res != 250) {
            fclose($socket);
            return $res;
        }

        fwrite($socket, "QUIT\r\n");
        fflush($socket);
        $res = fgets($socket);
        if ($res != 221) {
            fclose($socket);
            return $res;
        }
        fclose($socket);
        return "发送成功";
    } else {
        return "找不到主机";
    }
}