这里需(xū )要(yào )说(shuō )明的是,在我们系统里(lǐ )面(miàn )如(rú )果(guǒ )单独(dú )设置一个子域名解析,比如将主(zhǔ )机名(míng )设置(zhì )为(wéi )mail,单独解析到9,那(nà )么该解析(xī )记(jì )录(lù )优先(xiān )泛(fàn )域名(míng )在(zài )实际使(shǐ )用中(zhōng )作用是(shì )非常广泛的,比如实(shí )现无(wú )限二级域(yù )名功能,提(tí )供免费的(de )url转发,在(zài )
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