这里需(xū )要说(shuō )明的是(shì ),在(zài )我们系(xì )统里(lǐ )面如果单独设(shè )置一个子域名(míng )解析,比(bǐ )如(rú )将主机名设置(zhì )为mail,单(dān )独(dú )解析到9,那么该解析记录优先(xiān )泛域名(míng )在实(shí )际使用(yòng )中作用(yòng )是非(fēi )常广泛(fàn )的,比(bǐ )如实(shí )现无(wú )限二级(jí )域名功能,提(tí )供(gòng )免(miǎn )费(fèi )的url转发,在
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