这里需要说(shuō )明(míng )的是,在(zài )我们系统里(lǐ )面如(rú )果单独设置一(yī )个子域(yù )名解析,比如将主机(jī )名设(shè )置为mail,单(dān )独(dú )解析到9,那么(me )该(gāi )解(jiě )析记录优先(xiān )泛域名在实(shí )际(jì )使(shǐ )用中作(zuò )用是非常广泛(fàn )的,比如实(shí )现(xiàn )无(wú )限二级域名功能(néng ),提(tí )供免费(fèi )的(de )url转发,在
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