这里需(xū )要说明(míng )的是,在我们系统里(lǐ )面如果单独设(shè )置(zhì )一(yī )个子(zǐ )域名解析,比如将主机(jī )名设置(zhì )为(wéi )mail,单独解(jiě )析到9,那么(me )该解析记录优先泛(fàn )域(yù )名(míng )在实(shí )际使(shǐ )用(yòng )中作用(yòng )是非(fēi )常广泛(fàn )的,比(bǐ )如实现无(wú )限二(èr )级域名(míng )功能(néng ),提供免(miǎn )费的url转发(fā ),在
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