这里需(xū )要说(shuō )明的是(shì ),在(zài )我(wǒ )们(men )系(xì )统里(lǐ )面(miàn )如(rú )果单独设(shè )置(zhì )一个(gè )子(zǐ )域名解析,比如将主机(jī )名设置(zhì )为mail,单独解析(xī )到9,那么该(gāi )解析记(jì )录优先(xiān )泛域(yù )名(míng )在实际使用中作(zuò )用是非常广(guǎng )泛(fàn )的,比(bǐ )如实现无限二级域名功(gōng )能(néng ),提供免费的url转发,在
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