这里(lǐ )需(xū )要说(shuō )明的是,在我们系统里面(miàn )如(rú )果单(dān )独设置一个(gè )子(zǐ )域名(míng )解析,比(bǐ )如将主机(jī )名设(shè )置为mail,单独解析到9,那么(me )该(gāi )解析(xī )记录(lù )优先泛(fàn )域名在实(shí )际使用(yòng )中(zhōng )作(zuò )用(yòng )是非常(cháng )广泛的,比如实现无限(xiàn )二(èr )级域名功能,提(tí )供免费的url转发(fā ),在
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