这里需要说(shuō )明的是,在(zài )我们系(xì )统里面如果单(dān )独(dú )设置(zhì )一个子域名解(jiě )析,比如(rú )将主机名设置(zhì )为mail,单独解析(xī )到9,那么(me )该解析记录优(yōu )先泛(fàn )域名在(zài )实际使(shǐ )用中作用(yòng )是非(fēi )常广(guǎng )泛的(de ),比如实现(xiàn )无(wú )限(xiàn )二级(jí )域(yù )名(míng )功能,提供免费的url转发,在(zài )
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