php smtp实现发送邮件功能

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,$this->time_out);
if (!($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."rn".$body);
$this->smtp_debug("> ".str_replace("rn","n"."> ",$header."n> ".$body."n> "));
return TRUE;
}

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

function smtp_ok()
{
$response = str_replace("rn","",fgets($this->sock,512));
$this->smtp_debug($response."n");
if (!preg_match("/^[23]/",$response))
{
fputs($this->sock,"QUITrn");
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."rn");
$this->smtp_debug("> ".$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)
{
$address = preg_replace("/([ trn])+/",$address);
$address = preg_replace("/^.<(.+)>.$/",$address);
return $address;
}

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

}
?>

调用

//你的邮箱账号(去掉@163.com)
$smtpuser = "xxx";//你的163邮箱去掉后面的163.com
//你的邮箱密码
$smtppass = "xxx"; //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);

?>

代码链接：

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