这里(lǐ )需要说(shuō )明的是(shì ),在我们(men )系(xì )统里面(miàn )如果单(dān )独设置一个子域名解析,比(bǐ )如(rú )将(jiāng )主(zhǔ )机名(míng )设(shè )置(zhì )为mail,单(dān )独解析到9,那么该(gāi )解析记录优先泛域名(míng )在实际(jì )使(shǐ )用中作用是(shì )非(fēi )常(cháng )广(guǎng )泛(fàn )的,比(bǐ )如实现无限(xiàn )二级(jí )域名(míng )功能,提供免费的url转发,在(zài )
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