打开根目录文件：attachment.php
查找：

  1. $attach['filename'] = ‘"’.(strtolower($charset) == ‘utf-8′ && strexists($_SERVER['HTTP_USER_AGENT'], ‘MSIE’) ? urlencode($attach['filename']) : $attach['filename']).’"’;

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将其替换成：

  1. $attach['filename'] = ‘"ZooPDA-’.(strtolower($charset) == ‘utf-8′ && strexists($_SERVER['HTTP_USER_AGENT'], ‘MSIE’) ? urlencode($attach['filename']) : $attach['filename']).’"’;

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保存文件，后台更新缓存即可