dotnet-core_mail-server/MailServer/Program.cs

using DnsClient;
using System;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;

namespace SMTPServer
{
    class Program
    {
        static void Main(string[] args)
        {

            /*var request = new DnsQueryRequest();
            var response = request.ResolveAsync("fabianstamm.de", DnDns.Enums.NsType.MX, DnDns.Enums.NsClass.ANY, System.Net.Sockets.ProtocolType.Tcp);

            OutputResults(response);*/
            TcpClient s = new TcpClient();

            var l = new MailServer.SMTPServer.SmtpPortListener(25);

            while (true)
            {
                Thread.Sleep(500);

            }
        }
        
        private static async void TestAsync()
        {
            var lookup = new LookupClient();
            var result = await lookup.QueryAsync("fabianstamm.de.", QueryType.MX);

            foreach (var r in result.AllRecords)
            {
                Console.WriteLine(r.RecordToString());
            }
        }

        private static void Listener_OnConnected(object source, ConnectedEventArgs e)
        {
            //var session = new MTASession(e);
            //throw new NotImplementedException();
        }
        /*
        private static async void OutputResults(Task<DnDns.Query.DnsQueryResponse> res)
        {
            OutputResults(await res);
        }

        private static void OutputResults(DnDns.Query.DnsQueryResponse response)
        {
            Console.WriteLine("Bytes received: " + response.BytesReceived);

            Console.WriteLine("Name: " + response.Name);
            Console.WriteLine("OpCode: " + response.NsClass);
            Console.WriteLine("NsFlags: " + response.NsFlags);
            Console.WriteLine("NsType: " + response.NsType);
            Console.WriteLine("RCode: " + response.RCode);
            Console.WriteLine("OpCode: " + response.OpCode);

            // Enumerate the Answer Records
            Console.WriteLine("Answers:");
            foreach (IDnsRecord record in response.Answers)
            {
                Console.WriteLine(record.Answer);
                Console.WriteLine("  |--- RDATA Field Length: " + record.DnsHeader.DataLength);
                Console.WriteLine("  |--- Name: " + record.DnsHeader.Name);
                Console.WriteLine("  |--- NS Class: " + record.DnsHeader.NsClass);
                Console.WriteLine("  |--- NS Type: " + record.DnsHeader.NsType);
                Console.WriteLine("  |--- TTL: " + record.DnsHeader.TimeToLive);
                Console.WriteLine();
            }

            foreach (IDnsRecord record in response.AuthoritiveNameServers)
            {
                Console.WriteLine(record.Answer);
                Console.WriteLine("  |--- RDATA Field Length: " + record.DnsHeader.DataLength);
                Console.WriteLine("  |--- Name: " + record.DnsHeader.Name);
                Console.WriteLine("  |--- NS Class: " + record.DnsHeader.NsClass);
                Console.WriteLine("  |--- NS Type: " + record.DnsHeader.NsType);
                Console.WriteLine("  |--- TTL: " + record.DnsHeader.TimeToLive);
                Console.WriteLine();
            }

            foreach (IDnsRecord record in response.AdditionalRRecords)
            {
                Console.WriteLine(record.Answer);
                Console.WriteLine("  |--- RDATA Field Length: " + record.DnsHeader.DataLength);
                Console.WriteLine("  |--- Name: " + record.DnsHeader.Name);
                Console.WriteLine("  |--- NS Class: " + record.DnsHeader.NsClass);
                Console.WriteLine("  |--- NS Type: " + record.DnsHeader.NsType);
                Console.WriteLine("  |--- TTL: " + record.DnsHeader.TimeToLive);
                Console.WriteLine();
            }
        }*/
    }
}