这里需要说(shuō )明(míng )的是,在我(wǒ )们系(xì )统里面如果(guǒ )单(dān )独设置(zhì )一个子(zǐ )域名(míng )解析(xī ),比如将主机名设置为mail,单独解(jiě )析到9,那(nà )么该解析(xī )记录优先泛域名在实际(jì )使(shǐ )用(yòng )中(zhōng )作用是(shì )非常广(guǎng )泛的,比(bǐ )如实(shí )现无(wú )限(xiàn )二级域名功能(néng ),提供(gòng )免(miǎn )费的url转发(fā ),在
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