这里需(xū )要说明的是,在我(wǒ )们系统里面如(rú )果(guǒ )单独设置一个(gè )子域(yù )名(míng )解析,比(bǐ )如将(jiāng )主机名(míng )设(shè )置(zhì )为mail,单独(dú )解析到9,那么该解(jiě )析记(jì )录优先泛域(yù )名(míng )在实(shí )际使用中(zhōng )作用(yòng )是非常广(guǎng )泛(fàn )的,比如(rú )实现无限二(èr )级(jí )域名功能,提供免(miǎn )费的url转发,在
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