这(zhè )里需(xū )要说明的是,在我们(men )系统(tǒng )里面(miàn )如(rú )果(guǒ )单独设置一(yī )个子域(yù )名解析,比如将(jiāng )主机名设置为(wéi )mail,单独解析到9,那(nà )么该(gāi )解(jiě )析(xī )记(jì )录优先(xiān )泛域名在(zài )实际使用中(zhōng )作用是非常(cháng )广(guǎng )泛(fàn )的,比(bǐ )如实现无限二级域名功能,提(tí )供免费的url转(zhuǎn )发(fā ),在
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