在开始使用php发送邮件之前，需要先在邮箱设置开启smtp，拿到SMTP服务器的授权码
腾讯QQ邮箱（推荐）：smtp.qq.com smtp/pop3开启：http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=166 （注意腾讯邮箱要单独设置安全码 点击查看说明）
网易163邮箱：smtp.163.net smtp/pop3开启：http://help.163.com/10/0312/13/61J0LI3200752CLQ.html（注意网易免费邮箱smtp密码要单独设置 点击查看说明）
新浪免费邮箱：smtp.sina.com smtp/pop3开启：http://mail.sina.com.cn/help2/client01.html
腾讯企业邮箱：smtp.exmail.qq.com
雅虎免费邮箱：smtp.mail.yahoo.cn
网易126邮箱：smtp.126.com
搜狐免费邮箱：smtp.sohu.com
1、封装发送邮件类 SMTP.php 文件
<?php
class Smtp
{
/* Public Variables */
public $smtp_port;
public $time_out;
public $host_name;
public $log_file;
public $relay_host;
public $debug;
public $auth;
public $user;
public $pass;
/* Private Variables */
private $sock;
/* Constractor */
function __construct($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("/(^|( ))(.)/", "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: $from<".$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;
}
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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;
}
}
}
2、调用类，发送邮件
<?php
require_once "Smtp.class.php";
//******************** 配置信息 ********************************
$smtpserver = "smtp.163.com";//SMTP服务器
$smtpserverport =25;//SMTP服务器端口
$smtpusermail = "15920323421@163.com";//SMTP服务器的用户邮箱
$smtpemailto = $_POST['toemail'];//发送给谁
$smtpuser = "15920323421@163.com";//SMTP服务器的用户帐号，注：部分邮箱只需@前面的用户名
$smtppass = "SMTP服务器的授权码";//SMTP服务器的授权码
$mailtitle = $_POST['title'];//邮件主题
$mailcontent = "<h1>".$_POST['content']."</h1>";//邮件内容
$mailtype = "HTML";//邮件格式（HTML/TXT）,TXT为文本邮件
//************************ 配置信息 ****************************
$smtp = new Smtp($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
$state = $smtp->sendmail($smtpemailto, $smtpusermail, $mailtitle, $mailcontent, $mailtype);
echo "<div style='300px; margin:36px auto;'>";
if($state==""){
echo "对不起，邮件发送失败！请检查邮箱填写是否有误。";
echo "<a href='index.html'>点此返回</a>";
exit();
}
echo "恭喜！邮件发送成功！！";
echo "<a href='index.html'>点此返回</a>";
echo "</div>";
?>