这(zhè )里需要说(shuō )明的是(shì ),在(zài )我们系统里面如果(guǒ )单(dān )独设置(zhì )一个(gè )子域名解析,比(bǐ )如(rú )将主(zhǔ )机名(míng )设置为mail,单独解析到(dào )9,那么该(gāi )解析记录优先泛域名在实际(jì )使(shǐ )用中(zhōng )作用(yòng )是非常(cháng )广泛(fàn )的(de ),比(bǐ )如实现(xiàn )无限(xiàn )二级域名(míng )功能,提(tí )供(gòng )免费的url转(zhuǎn )发,在
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