DNS
域名系统（英文：DomainNameSystem，缩写：DNS）是互联网的一项服务。它作为将域名和IP地址相互映射的一个分布式数据库，能够使人更方便地访问互联网。DNS使用UDP端口53。当前，对于每一级域名长度的限制是63个字符，域名总长度则不能超过253个字符。
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sheerdns is a master DNS server whose zone records are stored on a One-Record-Per-File bases. Becaus
sheerdns is a master DNS server whose zone records are stored on a One-Record-Per-File bases. Because of this, it is the...
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A project written in C# sends email without smtp server. It queries dns server for mx records and se
A project written in C# sends email without smtp server. It queries dns server for mx records and sends them. It support...