这里(lǐ )需要说(shuō )明的是,在(zài )我们系统(tǒng )里面(miàn )如果(guǒ )单(dān )独设(shè )置一(yī )个子域名解析,比如将主机(jī )名设(shè )置为(wéi )mail,单独解(jiě )析到(dào )9,那(nà )么该解析记录(lù )优先(xiān )泛域名(míng )在(zài )实际(jì )使用中(zhōng )作(zuò )用是非常(cháng )广泛的,比如实现(xiàn )无限(xiàn )二级域名功(gōng )能,提(tí )供免费的url转(zhuǎn )发(fā ),在
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