php mail to 配置详解

[mail function] 
; For Win32 only. 
SMTP = mail3.focuschina.com 
smtp_port = 25 ; For Win32 only. 
;sendmail_from = [e-mail]

仅仅配置了如上的代码，没有用到用户名和密码，测试代码成功发送邮件
好读书，不求甚解。。以上

发送的测试代码：

<?php [php] view plaincopyprint?在CODE上查看代码片派生到我的代码片 
$subject = iconv('UTF-8', 'GBK', "邮件标题"); 
$message = iconv('UTF-8', 'GBK', "邮件内容发打发打发fasdfadsfasdf"); 
$from ='OA<[e-mail]>'; 
$from = iconv('UTF-8', 'GBK', $from); 
$headers = "From: " . $from . "\nContent-Type: text/html; charset=GBK; MIME-Version: 1.0'\n"; 
$to="[e-mail]"; 
if(mail($to, $subject, $message,$headers)){ 
echo "Ok."; 
}else{ 
echo "Fail."; 
}