这里(lǐ )需要(yào )说(shuō )明(míng )的是(shì ),在(zài )我(wǒ )们系统里面如(rú )果单(dān )独设置一(yī )个(gè )子域名(míng )解(jiě )析,比如(rú )将主机名设(shè )置为mail,单独解析到(dào )9,那(nà )么该解析记(jì )录优先(xiān )泛域名在(zài )实际使(shǐ )用中作用(yòng )是(shì )非(fēi )常广泛的,比如实现(xiàn )无限二级(jí )域名功能,提供免费的url转(zhuǎn )发,在
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