这里需要说(shuō )明的(de )是,在(zài )我们(men )系(xì )统里(lǐ )面如(rú )果单(dān )独设(shè )置一(yī )个子域名解析,比如(rú )将(jiāng )主机名设(shè )置为(wéi )mail,单独(dú )解析到(dào )9,那么该(gāi )解析(xī )记(jì )录优先泛域(yù )名在实际使用中(zhōng )作(zuò )用是(shì )非常(cháng )广(guǎng )泛(fàn )的,比如实现无限二级域名功能,提供免费(fèi )的url转发(fā ),在
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