这里需要说明的(de )是(shì ),在我(wǒ )们系(xì )统里(lǐ )面如果单(dān )独设置一(yī )个子域名解(jiě )析,比如(rú )将主(zhǔ )机名设置为mail,单独(dú )解析到9,那(nà )么该(gāi )解析(xī )记录(lù )优(yōu )先(xiān )泛域(yù )名在实际(jì )使(shǐ )用中作用是(shì )非常广(guǎng )泛的,比如实(shí )现无(wú )限二级(jí )域(yù )名(míng )功能,提供免费的(de )url转发,在(zài )
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