这里需(xū )要说(shuō )明(míng )的是,在我(wǒ )们(men )系统里(lǐ )面如果(guǒ )单(dān )独设置一个子域名解析,比如(rú )将(jiāng )主机(jī )名设(shè )置(zhì )为(wéi )mail,单独解析到9,那(nà )么该解析记录优先泛域名在(zài )实际使用中(zhōng )作用(yòng )是非(fēi )常广泛(fàn )的,比如(rú )实(shí )现(xiàn )无限二级域(yù )名(míng )功能,提供免费的(de )url转发,在
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