这(zhè )里需(xū )要说(shuō )明(míng )的是,在(zài )我(wǒ )们系统(tǒng )里面如果单独设置(zhì )一(yī )个子域(yù )名(míng )解析,比(bǐ )如将主机名设置为mail,单独解析到(dào )9,那么该解析记录优先(xiān )泛域名(míng )在实际使(shǐ )用(yòng )中作(zuò )用(yòng )是非(fēi )常广(guǎng )泛(fàn )的,比(bǐ )如(rú )实现无限(xiàn )二级域名(míng )功能,提供免费的(de )url转发(fā ),在
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