这(zhè )里(lǐ )需要说(shuō )明的是,在我(wǒ )们(men )系统里(lǐ )面如(rú )果单(dān )独设(shè )置一个子域名解析(xī ),比如将(jiāng )主(zhǔ )机名(míng )设置为mail,单(dān )独(dú )解析到9,那么该解(jiě )析记(jì )录(lù )优先泛(fàn )域名在实(shí )际使用中(zhōng )作用是非常(cháng )广(guǎng )泛的(de ),比(bǐ )如实现无限(xiàn )二级域名功能,提供(gòng )免费的url转发,在
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