把mail.xxxx.com换为您自己的域名即可. 
<ul class="module_login">
<form name="login" method="post" action=" http://mail.xxxx.com/login.php?Cmd=login"; >
http://mail.xxxx.com/login.php?Cmd=login"; >
<li><label>用户名:</label><span> 
<input name="name" type="text" class="input_text" size="15" value="" />
</span>@ 
<input name="domain" type="text" class="input_text" value="xxxx.com" size="15" />
</li>
<li><label>密 码 :</label><span> 
<input name="passwd" type="password" class="input_text" size="15" />
</span><span> 
<input type="hidden" name="Lang" value="" />
</span><label></label><span> 
<input type="SUBMIT" class="button" value="登 录 >>" />
</span></li>
</form>
</ul>
 <div class="mesg"></div>