这里需要(yào )说(shuō )明的(de )是,在我(wǒ )们系(xì )统(tǒng )里面(miàn )如(rú )果(guǒ )单独设置一个子域名解析,比如将主(zhǔ )机名设置为(wéi )mail,单独(dú )解析到9,那么该解(jiě )析(xī )记录优先(xiān )泛域(yù )名在(zài )实际使用(yòng )中(zhōng )作用是(shì )非常(cháng )广泛的,比如实(shí )现无(wú )限二(èr )级(jí )域名功(gōng )能,提(tí )供(gòng )免费的url转发,在
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