<?php 
$to = "test@163.com"; //收件人 
$subject = "Test"; //主題 
$message = "This is a test mail!"; //正文 
mail($to,$subject,$message); 

<?php 
$to = "test@163.com";//收件人 
$subject = "Test";//郵件主題 
$message = "This is a test mail!";//郵件正文 
ini_set('SMTP','smtp.163.com');//發(fā)件SMTP服務(wù)器 
ini_set('smtp_port',25);//發(fā)件SMTP服務(wù)器端口 
ini_set('sendmail_from',"admin@163.com");//發(fā)件人郵箱 
mail($to,$subject,$message); 

<?php 
 
// Pear Mail 擴展 
require_once('Mail.php'); 
require_once('Mail/mime.php'); 
require_once('Net/SMTP.php'); 
 
$smtpinfo = array(); 
$smtpinfo["host"] = "smtp.163.com";//SMTP服務(wù)器 
$smtpinfo["port"] = "25"; //SMTP服務(wù)器端口 
$smtpinfo["username"] = "username@163.com"; //發(fā)件人郵箱 
$smtpinfo["password"] = "password";//發(fā)件人郵箱密碼 
$smtpinfo["timeout"] = 10;//網(wǎng)絡(luò)超時時間，秒 
$smtpinfo["auth"] = true;//登錄驗證 
//$smtpinfo["debug"] = true;//調(diào)試模式 
 
// 收件人列表 
$mailAddr = array('receiver@163.com'); 
 
// 發(fā)件人顯示信息 
$from = "Name <username@163.com>"; 
 
// 收件人顯示信息 
$to = implode(',',$mailAddr); 
 
// 郵件標題 
$subject = "這是一封測試郵件"; 
 
// 郵件正文 
$content = "<h3>隨便寫點什么</h3>"; 
 
// 郵件正文類型，格式和編碼 
$contentType = "text/html; charset=utf-8"; 
 
//換行符號 Linux: \n Windows: \r\n 
$crlf = "\n"; 
$mime = new Mail_mime($crlf); 
$mime->setHTMLBody($content); 
 
$param['text_charset'] = 'utf-8'; 
$param['html_charset'] = 'utf-8'; 
$param['head_charset'] = 'utf-8'; 
$body = $mime->get($param); 
 
$headers = array(); 
$headers["From"] = $from; 
$headers["To"] = $to; 
$headers["Subject"] = $subject; 
$headers["Content-Type"] = $contentType; 
$headers = $mime->headers($headers); 
 
$smtp =& Mail::factory("smtp", $smtpinfo); 
 
 
$mail = $smtp->send($mailAddr, $headers, $body); 
$smtp->disconnect(); 
 
if (PEAR::isError($mail)) { 
 //發(fā)送失敗 
 echo 'Email sending failed: ' . $mail->getMessage()."\n"; 
} 
else{ 
 //發(fā)送成功 
 echo "success!\n"; 
}