这里需要说明的是,在我(wǒ )们系统里(lǐ )面如果(guǒ )单独设置(zhì )一(yī )个子域名解析,比如将主机(jī )名设置为mail,单独(dú )解(jiě )析到(dào )9,那么(me )该解析记录优先泛(fàn )域(yù )名在实际使(shǐ )用中(zhōng )作用是(shì )非常(cháng )广泛(fàn )的,比(bǐ )如实(shí )现(xiàn )无限(xiàn )二级域(yù )名(míng )功(gōng )能(néng ),提(tí )供免(miǎn )费的url转发(fā ),在
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