这(zhè )里(lǐ )需(xū )要说明的是,在我(wǒ )们(men )系统里(lǐ )面如(rú )果单独(dú )设(shè )置(zhì )一(yī )个(gè )子域名解析,比(bǐ )如(rú )将主(zhǔ )机名设置为mail,单独解析到9,那么该解析(xī )记录(lù )优先(xiān )泛域(yù )名(míng )在实(shí )际使(shǐ )用中作用是非常广泛的,比如(rú )实现无(wú )限二级(jí )域名(míng )功能,提供免(miǎn )费的url转发(fā ),在
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