这里需要说(shuō )明的是(shì ),在我们系统里面(miàn )如(rú )果单独设置一个(gè )子域名解析,比(bǐ )如将(jiāng )主机名设(shè )置为(wéi )mail,单独(dú )解析到9,那么该解析记录(lù )优(yōu )先泛(fàn )域名在(zài )实际使(shǐ )用中(zhōng )作用(yòng )是(shì )非(fēi )常广泛(fàn )的,比(bǐ )如实(shí )现无(wú )限二(èr )级(jí )域名(míng )功能(néng ),提(tí )供免费的url转发,在
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