这(zhè )里(lǐ )需要(yào )说明的是,在我们(men )系统里面如果(guǒ )单独设置一个子(zǐ )域名(míng )解析,比如(rú )将(jiāng )主机(jī )名设(shè )置为mail,单独解析(xī )到9,那么该(gāi )解(jiě )析记录优先泛域(yù )名在实际使用中(zhōng )作用是非常(cháng )广泛的,比如(rú )实(shí )现(xiàn )无(wú )限(xiàn )二级域(yù )名功能,提供免(miǎn )费的(de )url转发,在(zài )
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