这里需(xū )要说(shuō )明的是,在我(wǒ )们(men )系统里面(miàn )如果(guǒ )单独(dú )设置一个子域(yù )名解析,比如将主机名设(shè )置为mail,单(dān )独解析(xī )到9,那么该解析记录(lù )优先(xiān )泛域(yù )名(míng )在实(shí )际(jì )使(shǐ )用中作(zuò )用是非常广泛的(de ),比如实现(xiàn )无(wú )限二级域名(míng )功(gōng )能,提(tí )供免费的url转发(fā ),在
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