Using c # to write the SMTP service program, it contains client and sever, hope to be able to help you,

8SMTPClient\AssemblyInfo.cs
SMTPServer\AssemblyInfo.cs
8SMTPClient\Form1.cs
SMTPServer\Form1.cs
8SMTPClient\SMTPClient.csproj
SMTPServer\SMTPServer.csproj
8SMTPClient\App.ico
SMTPServer\App.ico
SMTPServer\Form1.resx
8SMTPClient\Form1.resx
8SMTPClient\SMTPClient.sln
SMTPServer\SMTPServer.sln
8SMTPClient\SMTPClient.suo
SMTPServer\SMTPServer.suo
8SMTPClient\SMTPClient.csproj.user
SMTPServer\SMTPServer.csproj.user
8SMTPClient\bin\Debug
8SMTPClient\obj\Debug
SMTPServer\bin\Debug
SMTPServer\obj\Debug
8SMTPClient\bin
SMTPServer\bin
8SMTPClient\obj
SMTPServer\obj
8SMTPClient
SMTPServer

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