这里(lǐ )需(xū )要(yào )说明(míng )的是,在(zài )我们系统里(lǐ )面如果单独设(shè )置(zhì )一个子(zǐ )域名解析(xī ),比如将主机(jī )名设(shè )置为mail,单独解析到9,那么该解析记录优(yōu )先泛域名(míng )在实(shí )际(jì )使(shǐ )用中作用(yòng )是非(fēi )常(cháng )广(guǎng )泛的,比(bǐ )如(rú )实(shí )现无限(xiàn )二级(jí )域名(míng )功能,提供免(miǎn )费的url转发(fā ),在
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