这(zhè )里需(xū )要说明的是(shì ),在(zài )我(wǒ )们系统里面如果单独设置(zhì )一个子域名解(jiě )析,比如将(jiāng )主机名(míng )设置为mail,单独解析到(dào )9,那么(me )该解(jiě )析(xī )记录(lù )优(yōu )先泛域名在实际(jì )使用中(zhōng )作用(yòng )是非(fēi )常广(guǎng )泛(fàn )的,比(bǐ )如实现无(wú )限二级(jí )域名(míng )功(gōng )能,提(tí )供免费的url转(zhuǎn )发,在
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