这(zhè )里需要说明的是,在我(wǒ )们系统里(lǐ )面如果(guǒ )单独设置(zhì )一个(gè )子(zǐ )域(yù )名解析,比如将(jiāng )主机名(míng )设置为(wéi )mail,单独解(jiě )析到9,那么(me )该解析(xī )记录(lù )优(yōu )先泛(fàn )域名在实际使用中(zhōng )作(zuò )用(yòng )是非常广泛(fàn )的(de ),比如(rú )实(shí )现无限二级域名功(gōng )能,提供(gòng )免费的url转发,在(zài )
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