这(zhè )里需要说(shuō )明(míng )的是(shì ),在我们系(xì )统(tǒng )里(lǐ )面如果单独设置(zhì )一个子域(yù )名解(jiě )析(xī ),比如将主机名设置(zhì )为mail,单(dān )独解(jiě )析到9,那么(me )该(gāi )解析记录优先泛域名在(zài )实(shí )际(jì )使用(yòng )中作用是非常广泛的,比如(rú )实(shí )现(xiàn )无(wú )限二(èr )级域名功(gōng )能,提供(gòng )免费的url转发,在
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