这里(lǐ )需要(yào )说明的是,在(zài )我们系统里(lǐ )面如果单(dān )独设置(zhì )一个子域名解析,比如(rú )将主(zhǔ )机(jī )名设置(zhì )为mail,单独(dú )解(jiě )析(xī )到9,那么(me )该解析记(jì )录(lù )优先(xiān )泛域名(míng )在(zài )实际使用中作(zuò )用是非(fēi )常广泛的,比(bǐ )如实现无限二级域(yù )名功能,提供(gòng )免费的url转发(fā ),在(zài )
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