一个验证smtp方式发送邮件的php脚本

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### 本程式由 "中国频道" 提供，请大家视情况修改
///以下将表单的内容写入message中
if ($message == "") $message = "heloaofldskjfklsjlkfjsdjfs";
if ($to == "") $to = "[email protected]"; //如果表单中没有收件人，请设置默认收件人e-mail
if ($from == "") $from = "[email protected]"; //如果表单中没有寄件人，请设置默认寄件人e-mail
if ($subject == "") $subject = "Hello~~~"; //如果表单中没有指定主题，请设置默认主题
if ($end = send22($to,$from,$subject,$message ) ) echo $end;
else echo "发送成功!";
function send22($to,$from,$subject, $message )
{
//使用本函数之前，务必请定义好以下变量#############################################
$smtp = "mail.lubingit.com"; //您的SMTP 服务器供应商，可以是域名或IP地址
$check = 1; //SMTP需要要身份验证设值为 1 不需要身份验证值为 0，现在大多数的SMTP服务商都要验证，如不清楚请与你的smtp 服务商联系。
if ($check) {
    $username = "[email protected]";   //您的email帐号名称
    $password = "123abc"; //您的email密码
}
$s_from = "[email protected]"; //此email 必需是发信服务器上的email
###############################################
      //连接服务器
      $fp = fsockopen ( $smtp, 25, $errno, $errstr, 60);
      if (!$fp ) return "联接服务器失败".__LINE__;
    set_socket_blocking($fp, true );

      $lastmessage=fgets($fp,512);
    if ( substr($lastmessage,0,3) != 220 ) return "错误信息:".$lastmessage.__LINE__;

      //HELO
    $yourname = "YOURNAME";
    if($check == "1") $lastact="EHLO ".$yourname."
";
    else $lastact="HELO ".$yourname."
";
    fputs($fp, $lastact);
    $lastmessage == fgets($fp,512);
    if (substr($lastmessage,0,3) != 220 ) return "错误信息$lastmessage".__LINE__;
    while (true) {
        $lastmessage = fgets($fp,512);
        if ( (substr($lastmessage,3,1) != "-") or (empty($lastmessage)) )           break;    
}

    //身份验证
    if ($check=="1") {
        //验证开始
        $lastact="AUTH LOGIN"."
";
        fputs( $fp, $lastact);
        $lastmessage = fgets ($fp,512);
        if (substr($lastmessage,0,3) != 334) return "错误信息$lastmessage".__LINE__;
          //用户姓名
        $lastact=base64_encode($username)."
";
        fputs( $fp, $lastact);
        $lastmessage = fgets ($fp,512);
        if (substr($lastmessage,0,3) != 334) return "错误信息$lastmessage".__LINE__;
        //用户密码
        $lastact=base64_encode($password)."
";
        fputs( $fp, $lastact);
        $lastmessage = fgets ($fp,512);
        if (substr($lastmessage,0,3) != "235") return "错误信息$lastmessage".__LINE__;
}

    //FROM:
    $lastact="MAIL FROM: $s_from" . "
";
    fputs( $fp, $lastact);
    $lastmessage = fgets ($fp,512);
    if (substr($lastmessage,0,3) != 250) return "错误信息$lastmessage".__LINE__;

    //TO:
    $lastact="RCPT TO: $to" . "
";
    fputs( $fp, $lastact);
    $lastmessage = fgets ($fp,512);
    if (substr($lastmessage,0,3) != 250) return "错误信息$lastmessage".__LINE__;

      //DATA
    $lastact="DATA
";
    fputs($fp, $lastact);
    $lastmessage = fgets ($fp,512);     if (substr($lastmessage,0,3) != 354) return "错误信息$lastmessage".__LINE__;


//处理Subject头
    $head="Subject: $subject
";
    $message = $head."
".$message;


  //处理From头
      $head="From: $from
";
    $message = $head.$message;


  //处理To头
      $head="To: $to
";
    $message = $head.$message;


  //加上结束串
      $message .= "
.
";


    //发送信息
      fputs($fp, $message);
      $lastact="QUIT
";

    fputs($fp,$lastace);
      fclose($fp);
      return 0;
}
?>