这(zhè )里(lǐ )需要说(shuō )明(míng )的(de )是,在我(wǒ )们系统里面如果(guǒ )单独设置一个子(zǐ )域名(míng )解析,比(bǐ )如(rú )将主机名(míng )设置为mail,单(dān )独解析到9,那么该解析(xī )记录(lù )优(yōu )先泛(fàn )域名在实际(jì )使用中(zhōng )作用(yòng )是非常广泛的,比如(rú )实现无限(xiàn )二级域名功(gōng )能,提(tí )供(gòng )免费的url转(zhuǎn )发,在
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