这(zhè )里(lǐ )需要(yào )说明的是,在(zài )我(wǒ )们(men )系统里面(miàn )如果单独(dú )设(shè )置(zhì )一(yī )个子(zǐ )域名解析,比如将主机(jī )名设置(zhì )为(wéi )mail,单独(dú )解(jiě )析到(dào )9,那么(me )该解析记录(lù )优(yōu )先泛域名(míng )在实际(jì )使用(yòng )中作用(yòng )是(shì )非常广泛的,比如实现(xiàn )无限二级域名(míng )功能,提供免费的url转发,在
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