这里需(xū )要说明的(de )是,在我(wǒ )们系(xì )统里(lǐ )面(miàn )如(rú )果单独设置一个(gè )子域(yù )名解(jiě )析,比如将主(zhǔ )机名(míng )设置为mail,单(dān )独(dú )解(jiě )析到9,那么该解(jiě )析记录优先泛域名在(zài )实际使用(yòng )中作用是(shì )非常(cháng )广(guǎng )泛的,比如(rú )实现(xiàn )无(wú )限(xiàn )二级域名功能,提(tí )供(gòng )免费的url转发(fā ),在
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