这(zhè )里(lǐ )需要(yào )说(shuō )明(míng )的(de )是,在我(wǒ )们系(xì )统里面如果单独(dú )设置一个子域(yù )名解(jiě )析,比如(rú )将(jiāng )主机名设置为mail,单独(dú )解析到(dào )9,那么(me )该(gāi )解(jiě )析(xī )记录优先泛域名在(zài )实际使用(yòng )中作(zuò )用是(shì )非常广(guǎng )泛的,比如实(shí )现无限二级(jí )域名功能(néng ),提供(gòng )免(miǎn )费的url转发(fā ),在
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