这(zhè )里需(xū )要说(shuō )明(míng )的是,在(zài )我(wǒ )们系统(tǒng )里面如果单独设置一(yī )个子域名(míng )解析,比如将(jiāng )主机(jī )名设置为mail,单独(dú )解(jiě )析到9,那么该解(jiě )析记(jì )录(lù )优先泛(fàn )域名在(zài )实际使用中(zhōng )作用(yòng )是(shì )非常(cháng )广泛(fàn )的,比如实(shí )现无限二(èr )级域名功能,提供免费的url转(zhuǎn )发,在
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