这里(lǐ )需要说明(míng )的是,在我们系统里(lǐ )面(miàn )如果单(dān )独设(shè )置(zhì )一(yī )个(gè )子域名解析,比如将主(zhǔ )机名设置为(wéi )mail,单独解(jiě )析到(dào )9,那么(me )该(gāi )解(jiě )析记录(lù )优先泛域名在(zài )实际(jì )使用中(zhōng )作(zuò )用(yòng )是非(fēi )常广泛(fàn )的,比如(rú )实现无限(xiàn )二级域名功能(néng ),提(tí )供免费的url转发(fā ),在
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