这里需要说(shuō )明(míng )的(de )是(shì ),在我(wǒ )们(men )系统(tǒng )里面如(rú )果单独设置一个子(zǐ )域名解(jiě )析,比如将主机(jī )名设(shè )置(zhì )为mail,单(dān )独(dú )解析到9,那么(me )该(gāi )解析记录优先(xiān )泛域名在实际使(shǐ )用中作(zuò )用是非(fēi )常广泛的,比如实(shí )现无(wú )限二级域名(míng )功(gōng )能,提供(gòng )免(miǎn )费(fèi )的url转发(fā ),在(zài )
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