檢查電子郵件地址是否屬於雅虎？

private byte[] BytesFromString(string str) 
    { 
     return Encoding.ASCII.GetBytes(str); 
    } 
    private int GetResponseCode(string ResponseString) 
    { 
     return int.Parse(ResponseString.Substring(0, 3)); 
    } 
    protected void Button1_Click(object sender, EventArgs e) 
    { 
     TcpClient tClient = new TcpClient("plus.smtp.mail.yahoo.com", 465); 
     string CRLF = "\r\n"; 
     byte[] dataBuffer; 
     string ResponseString; 
     NetworkStream netStream = tClient.GetStream(); 
     StreamReader reader = new StreamReader(netStream); 
     ResponseString = reader.ReadLine(); 
     dataBuffer = BytesFromString("HELO " + CRLF); 
     netStream.Write(dataBuffer, 0, dataBuffer.Length); 
     ResponseString = reader.ReadLine(); 
     dataBuffer = BytesFromString("MAIL FROM:<[email protected]>" + CRLF); 
     netStream.Write(dataBuffer, 0, dataBuffer.Length); 
     ResponseString = reader.ReadLine(); 
     dataBuffer = BytesFromString("RCPT TO:<" + TextBox1.Text.Trim() + ">" + CRLF); 
     netStream.Write(dataBuffer, 0, dataBuffer.Length); 
     ResponseString = reader.ReadLine(); 
     if (GetResponseCode(ResponseString) == 550) 
     { 
      Response.Write("Mai Address Does not Exist !"); 
     } 
     dataBuffer = BytesFromString("QUITE" + CRLF); 
     netStream.Write(dataBuffer, 0, dataBuffer.Length); 
     tClient.Close(); 
    }

嗨，此代碼不能與SMTP服務器雅虎，但代碼工作的工作與Gmail的SMTP服務器TcpClient tClient = new TcpClient("gmail-smtp-in.l.google.com", 25)檢查電子郵件地址是否屬於雅虎？

error:An established connection was aborted by the software in your host machine in line Response String = reader.ReadLine();

，並更改端口服務器25沒有發生！ smtp服務器和端口服務器是否有效？有沒有辦法確保電子郵件有效？有人可以幫助我嗎？

來源

2013-07-31 Hossein Hagh

請參閱：http://stackoverflow.com/questions/3040104/verify-that-email-domain-exists – 2013-07-31 08:04:50

用於算法responsing從中獲取數據的一些服務器主機比機器特定的服務器無法響應.....

，但正如你所說的Gmail提供數據，因此機器不能使用任何對回覆數據的限制......

來源

2013-07-31 09:07:57

檢查電子郵件地址是否屬於雅虎？

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