夹缝中求生存-在一无所有的php虚拟主机环境下利用smtp发送邮件（一）

夹缝中求生存

利用php虚拟主机向指定QQ邮箱账户发送一份电子邮件，以163邮箱为例。

前言：在阿里云虚拟主机php的苛刻环境下，php函数库少的可怜，各种不支持，想要发送一份不被收件邮箱屏蔽的邮件，顿时感觉整个世界都黑暗了，不过还好，在夹缝中求生存，踩过了各种坑，最后还是有解决之道的。

• 首先得注册163个人邮箱账号，配置SMTP并设置授权密码（此部分不再赘述，如有疑问请自行百度）。
• 几点提醒：
  • 邮件发送成功却未收到邮件提醒：发送的邮件可能被放到了垃圾箱，尤其是注意账户为QQ邮箱的收件人。
  • 邮件内容不要太多，否则很有可能会被当成垃圾邮件处理（亲测发送整段html代码邮件会被QQ收件邮箱会屏蔽拒收邮件，而163收件邮箱会正常接收邮件），尤其是注意账户为QQ邮箱的收件人。
  • 以下是以163邮箱配置smpt，亲测代码可用，其他邮箱配置smpt未作尝试。
  • 已解决自定义发件人，代码中已写明。
  • 未解决当收件邮箱为QQ邮箱时，邮件会被QQ邮箱当作垃圾邮件处理的问题。
• 以下是php代码：

test.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 = "****@163.com";//
//收件人邮箱，***@163.com/***@qq.com
$smtpemailto = "707490440@qq.com";
//发送人，可随意显示发件人
$sender = "邮件发送方";
//你的邮箱账号(去掉@163.com)
$smtpuser = "****";//你的163邮箱去掉后面的163.com
//你的邮箱密码
$smtppass = "*****"; //你的163邮箱SMTP的授权码，千万不要填密码！！！

//邮件主题
$mailsubject = "邮件提醒";
//邮件内容
$mailbody = "
详细信息：</br>
<h1>这是一封测试邮件</h1>
";
//邮件格式（HTML/TXT）,TXT为文本邮件
$mailtype = "HTML";
//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, $sender ,$mailsubject, $mailbody, $mailtype);
  
?>

smtp.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, $sender, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")
 {
  $mail_from = $this->get_address($this->strip_comment($from));
  $body = preg_replace("/(^|(
))(.)/", "1.3", $body);
  $header = "MIME-Version:1.0
";
  if($mailtype=="HTML")
  {
   $header .= "Content-Type:text/html
";
  }
  $header .= "To: ".$to."
";
  if ($cc != "")
  {
   $header .= "Cc: ".$cc."
";
  }
  $header .= "From: ".$sender."<".$from.">
";
  $header .= "Subject: ".$subject."
";
  $header .= $additional_headers;
  $header .= "Date: ".date("r")."
";
  $header .= "X-Mailer:By Redhat (PHP/".phpversion().")
";
  list($msec, $sec) = explode(" ", microtime());
  $header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">
";
  $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."
");
    $sent = FALSE;
    continue;
   }
   if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body))
   {
    $this->log_write("E-mail has been sent to <".$rcpt_to.">
");
   }
   else
   {
    $this->log_write("Error: Cannot send email to <".$rcpt_to.">
");
    $sent = FALSE;
   }
   fclose($this->sock);
   $this->log_write("Disconnected from remote host
");
  }
  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."
");
  $this->sock = @fsockopen($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."
");
   $this->log_write("Error: ".$errstr." (".$errno.")
");
   return FALSE;
  }
  $this->log_write("Connected to relay host ".$this->relay_host."
");
  return TRUE;;
 }
  
 function smtp_sockopen_mx($address)
 {
  $domain = preg_replace("^.+@([^@]+)$", "1", $address);
  if (!@getmxrr($domain, $MXHOSTS))
  {
   $this->log_write("Error: Cannot resolve MX "".$domain.""
");
   return FALSE;
  }
  foreach ($MXHOSTS as $host)
  {
   $this->log_write("Trying to ".$host.":".$this->smtp_port."
");
   $this->sock = @fsockopen($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."
");
    $this->log_write("Error: ".$errstr." (".$errno.")
");
    continue;
   }
   $this->log_write("Connected to mx host ".$host."
");
   return TRUE;
  }
  $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")
");
  return FALSE;
 }
  
 function smtp_message($header, $body)
 {
  fputs($this->sock, $header."
".$body);
  $this->smtp_debug("> ".str_replace("
", "
"."> ", $header."
> ".$body."
> "));
  return TRUE;
 }
  
 function smtp_eom()
 {
  fputs($this->sock, "
.
");
  $this->smtp_debug(". [EOM]
");
  return $this->smtp_ok();
 }
  
 function smtp_ok()
 {
  $response = str_replace("
", "", fgets($this->sock, 512));
  $this->smtp_debug($response."
");
  if (!preg_match("/^[23]/", $response))
  {
   fputs($this->sock, "QUIT
");
   fgets($this->sock, 512);
   $this->log_write("Error: Remote host returned "".$response.""
");
   return FALSE;
  }
  return TRUE;
 }
  
 function smtp_putcmd($cmd, $arg = "")
 {
  if ($arg != "")
  {
   if($cmd=="")
   {
    $cmd = $arg;
   }
   else
   {
    $cmd = $cmd." ".$arg;
   }
  }
  fputs($this->sock, $cmd."
");
  $this->smtp_debug("> ".$cmd."
");
  return $this->smtp_ok();
 }
  
 function smtp_error($string)
 {
  $this->log_write("Error: Error occurred while ".$string.".
");
  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.""
");
   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("/([ 	
])+/", "", $address);
  $address = preg_replace("/^.*<(.+)>.*$/", "1", $address);
  return $address;
 }
  
 function smtp_debug($message)
 {
  if ($this->debug)
  {
   echo $message;
  }
 }
  
}
?>