这里需要(yào )说(shuō )明(míng )的是,在我们系(xì )统里面如(rú )果单独(dú )设(shè )置一个(gè )子域名(míng )解(jiě )析,比如将(jiāng )主机(jī )名设置(zhì )为mail,单独(dú )解析(xī )到9,那么该解(jiě )析记(jì )录优先泛域名在(zài )实际使(shǐ )用(yòng )中(zhōng )作用(yòng )是(shì )非常广(guǎng )泛的,比如实现无限二级域名功(gōng )能,提供(gòng )免费的url转发,在
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