The POP3 mail server (%S) does not support the TOP command. Without server support for this, we cannot implement the ``Maximum Message Size'' or ``Fetch Headers Only'' preference.  This option has been disabled, and messages will be downloaded regardless of their size.
POP3 邮件服务器 （%S）不支持 TOP命令，而这是使用“最大消息长度”或“仅下载消息头”首选项设置必须的。消息将被无视大小下载。