这里(lǐ )需要说(shuō )明的(de )是(shì ),在(zài )我(wǒ )们系统里面如果单独设置一(yī )个子域名解析,比如将主机(jī )名设(shè )置为mail,单独解(jiě )析到(dào )9,那么(me )该解(jiě )析(xī )记录(lù )优先(xiān )泛(fàn )域名(míng )在实际使用中(zhōng )作用(yòng )是非常广泛的(de ),比(bǐ )如实现(xiàn )无限二级域(yù )名功能,提供免费的url转(zhuǎn )发(fā ),在
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