PHP使用STMP发送电子邮件类
//##########################################
$smtpserver = “smtp.qq.com”;//SMTP服务器
$smtpserverport =25;//SMTP服务器端口
$smtpusermail = “”;//SMTP服务器的用户邮箱
$smtpemailto = $mailto;//发送给谁
$smtpuser = “”;//SMTP服务器的用户帐号
$smtppass = “”;//SMTP服务器的用户密码
$mailsubject = $mailtitle;//邮件主题
$mailbody = $val;//邮件内容
$mailtype = “HTML”;//邮件格式(HTML/TXT),TXT为文本邮件
##########################################

<?
if(isset($_POST['send']) && $_POST['send']=="true")
{
	require_once ('email.class.php');
	$mailto=trim($_POST['mailto']);
	$mailtitle=trim($_POST['title']);
	$myfile="mbody.txt";
	$fp = fopen($myfile,"rb");
	while(false!==($chr=fgetc($fp)))
	{
		$val.= $chr;
	}	
	@fclose($myfile);
	
	//exit;
	
	//##########################################
	$smtpserver = "smtp.qq.com";//SMTP服务器
	$smtpserverport =25;//SMTP服务器端口
	$smtpusermail = "";//SMTP服务器的用户邮箱
	$smtpemailto = $mailto;//发送给谁
	$smtpuser = "";//SMTP服务器的用户帐号
	$smtppass = "";//SMTP服务器的用户密码
	$mailsubject = $mailtitle;//邮件主题
	$mailbody = $val;//邮件内容
	$mailtype = "HTML";//邮件格式(HTML/TXT),TXT为文本邮件
	##########################################
	$smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);//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->debug = false;//是否显示发送的调试信息
	$rtn=$smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);
	if($rtn)
	{
		echo "成功";
	}
	else
	{
		echo "失败";
	}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>SMTP邮件发送</title>
</head>

<body>
<form method="post" name="form1" id="form1" action="" enctype="multipart/form-data">
<input type="text" name="mailto" />
<input type="text" name="title" />
<input type="hidden" name="send" value="true" />
<button type="submit">提交</button>
</form>
</body>
</html>

email.class.php

<?
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 = ereg_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");
		}
		//echo "<br>";
		//echo $header;
		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)
	{
		$domain = ereg_replace("^.+@([^@]+)$", "\\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 (!ereg("^[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)
	{
		$comment = "\\([^()]*\\)";
		while (ereg($comment, $address)) {
		$address = ereg_replace($comment, "", $address);
		}
		
		return $address;
	}
	
	function get_address($address)
	{
		$address = ereg_replace("([ \t\r\n])+", "", $address);
		$address = ereg_replace("^.*<(.+)>.*$", "\\1", $address);
		
		return $address;
	}
	
	function smtp_debug($message)
	{
		if ($this->debug) {
		echo $message."<br>";
		}
	}

	function get_attach_type($image_tag) { //
		
		$filedata = array();
		
		$img_file_con=fopen($image_tag,"r");
		unset($image_data);
		while ($tem_buffer=AddSlashes(fread($img_file_con,filesize($image_tag))))
		$image_data.=$tem_buffer;
		fclose($img_file_con);
		
		$filedata['context'] = $image_data;
		$filedata['filename']= basename($image_tag);
		$extension=substr($image_tag,strrpos($image_tag,"."),strlen($image_tag)-strrpos($image_tag,"."));
		switch($extension){
		case ".gif":
		$filedata['type'] = "image/gif";
		break;
		case ".gz":
		$filedata['type'] = "application/x-gzip";
		break;
		case ".htm":
		$filedata['type'] = "text/html";
		break;
		case ".html":
		$filedata['type'] = "text/html";
		break;
		case ".jpg":
		$filedata['type'] = "image/jpeg";
		break;
		case ".tar":
		$filedata['type'] = "application/x-tar";
		break;
		case ".txt":
		$filedata['type'] = "text/plain";
		break;
		case ".zip":
		$filedata['type'] = "application/zip";
		break;
		default:
		$filedata['type'] = "application/octet-stream";
		break;
		}
		return $filedata;
	}
}
?>
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