这里需要说(shuō )明(míng )的(de )是,在我(wǒ )们系(xì )统里面如果单独设(shè )置一个(gè )子域名解析,比如将主机(jī )名设置为mail,单独解析到(dào )9,那(nà )么(me )该解析(xī )记(jì )录(lù )优(yōu )先泛域(yù )名在实(shí )际使(shǐ )用中(zhōng )作用是(shì )非(fēi )常(cháng )广(guǎng )泛的,比如(rú )实现无(wú )限(xiàn )二级域名功能,提(tí )供免费的(de )url转发,在
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