这里(lǐ )需要(yào )说(shuō )明(míng )的(de )是,在我们系(xì )统里面如果单(dān )独设(shè )置一个子域名解析(xī ),比(bǐ )如(rú )将主(zhǔ )机(jī )名(míng )设置(zhì )为mail,单独(dú )解析到(dào )9,那么该(gāi )解析记录(lù )优先(xiān )泛域(yù )名在实际使(shǐ )用中(zhōng )作用是非常(cháng )广泛的(de ),比(bǐ )如实现无限二级域名功(gōng )能,提供免费的url转发(fā ),在
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