最近paperen公司的那个搞了一年的东西也差不多可以拿出来了，至少在数据上可靠了点，界面上就……程序上就更……关于丢失密码的处理会有涉及到给会员的注册邮箱发送邮件功能，其实就是运用了SMTP这个服务。

正如对PHP函数有了解的人都应该知道PHP中有一个mail函数，直接调用它理论上就可以发送邮件了

220 163.com Anti-spam GT for Coremail System (163com[20101010])
helo paperen
250 OK
auth login
334 dXNlcm5hbWU6
//你帐号的base64码
334 UGFzc3dvcmQ6
//你帐号密码的base64码
235 Authentication successful
mail from:
250 Mail OK
rcpt to:
250 Mail OK
data
354 End data with .
mime-version:1.0
from:paperen
to:paperen
subject:test
content-type:text/html; charset="utf-8"
//这里要空两行,1行
//2行
hello world!
.
250 Mail OK queued as smtp4,DtGowLCbrgVa+y5N1C9xAA--.11142S2 1294924769

$smtp_server = 'smtp.163.com';
$smtp_port = '25';
$fp = fsockopen( $smtp_server , $smtp_port );
echo fgets( $fp );
//220 163.com Anti-spam GT for Coremail System (163com[20101010])
fclose( $fp );

$username = '***';//您邮箱的帐号，@前面的
$password = '***';//密码

$from = 'paperen@163.com';//寄信人邮箱
$to = 'paperen@gmail.com';//收件人邮箱
$smtp_server = 'smtp.163.com';//smtp服务器
$smtp_port = '25';//端口
$message = "Hello paperen,i use php send a mail to you,very cool yet?";//邮件内容
$subject = "Test Only";//邮件标题

set_time_limit(0);

$fp = fsockopen( $smtp_server , $smtp_port );
if( substr( fgets( $fp ), 0, 3 ) != '220' ) exit('connect error');

//hello
fputs($fp, "helo 163\r\n");
if( substr( fgets( $fp ), 0, 3 ) != '250' ) exit('helo error');

//auth login
fputs($fp, "auth login\r\n");
if( substr( fgets( $fp ), 0, 3 ) != '334' ) exit('user error');
fputs($fp, base64_encode( $username ) . "\r\n" );
if( substr( fgets( $fp ), 0, 3 ) != '334' ) exit('pwd error');
fputs($fp, base64_encode( $password ) . "\r\n" );

//auth success
if( substr( fgets( $fp ), 0, 3 ) != '235' ) exit('auth failed');

//mail from
fputs($fp, "mail from:<{$from}>\r\n" );
if( substr( fgets( $fp ), 0, 3 ) != '250' ) exit('mail from error');

//rcpt to
fputs($fp, "rcpt to:<{$to}>\r\n" );
if( substr( fgets( $fp ), 0, 3 ) != '250' ) exit('rcpt to error');

//data
fputs($fp, "data\r\n" );
if( substr( fgets( $fp ), 0, 3 ) != '354' ) exit('data error');

//header
$headers = "mime-version: 1.0\r\n";
$headers .= "from: paperen<{$from}>\r\n";
$headers .= "to: paperen<{$to}>\r\n";
$headers .= "subject: {$subject}\r\n";
$headers .= "content-type: text/html; charset=utf-8\r\n";

fputs($fp, "{$headers}\r\n\r\n" );
fputs($fp, "$message\r\n");
fputs($fp, ".\r\n");

if( substr( fgets( $fp ), 0, 3 ) != '250' ) exit('sendmail failed');
echo 'OK';

fclose( $fp );

$email_subject = '=?' . $mail['charset'] . '?B?'.base64_encode(preg_replace("/[\r|\n]/", '', '['.$mail['sitename'].'] '.$subject)).'?=';
$email_message = chunk_split(base64_encode(str_replace("\n", "\r\n", str_replace("\r", "\n", str_replace("\r\n", "\n", str_replace("\n\r", "\r", $message))))));

$headers = "From: $email_from{$maildelimiter}X-Priority: 3{$maildelimiter}X-Mailer: ". $mail['sitename'] ."{$maildelimiter}MIME-Version: 1.0{$maildelimiter}Content-type: text/html; charset=" . $mail['charset'] . "{$maildelimiter}Content-Transfer-Encoding: base64{$maildelimiter}";