private static void Main(string[] args)
{
if (args.Length < 1)
{
Console.WriteLine("resolver {host|ip address}");
return;
}
string hostOrAddress = args[0].ToLower();
string sDNSResult;
char cFirstDigit = hostOrAddress[0];
if (cFirstDigit >= 'a' && cFirstDigit <= 'z')
{
sDNSResult = DNSResolver.Hostname2IP(hostOrAddress);
}
else
{
sDNSResult = DNSResolver.IP2Hostname(hostOrAddress);
}
//Console.Clear();
Console.ForegroundColor = ConsoleColor.Green;
Console.Write("{0}", hostOrAddress);
Console.ForegroundColor = ConsoleColor.White;
Console.Write(" résolve sur: ");
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("{0}", sDNSResult);
Console.ForegroundColor = ConsoleColor.White;
}
public static EmailAddressStatus CheckMailAddressValid(string emailAddress, IPAddress dnsServerAddress, out string message)
{
EmailAddressStatus result = EmailAddressStatus.Unkown;
message = string.Empty;
if (emailValidRegex.IsMatch(emailAddress))
{
MXRecord[] records = DNSResolver.MXLookup(emailAddress.Substring(emailAddress.IndexOf("@") + 1), dnsServerAddress);
if (records != null && records.Length > 0)
{
foreach (MXRecord record in records)
{
Socket socket = null;
try
{
IPEndPoint remoteEP = new IPEndPoint(Dns.GetHostEntry(record.DomainName).AddressList[0], 25);
socket = new Socket(remoteEP.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
socket.Connect(remoteEP);
message = Get_Response(socket);
if (GetResponseCode(message) == 220)
{
SendData(socket, "HELO {0}\r\n".FormatWith(record.DomainName));
message = Get_Response(socket);
if (GetResponseCode(message) == 250)
{
SendData(socket, "MAIL FROM:<{0}>\r\n".FormatWith("*****@*****.**"));
message = Get_Response(socket);
if (GetResponseCode(message) == 250)
{
SendData(socket, "RCPT TO:<{0}>\r\n".FormatWith(emailAddress));
message = Get_Response(socket);
if (GetResponseCode(message) == 250)
{
return(EmailAddressStatus.Valid);
}
if (message.IndexOf("denied") > 0)
{
SendData(socket, "QUIT\r\n");
socket.Close();
return(EmailAddressStatus.DenyAccess);
}
return(EmailAddressStatus.AccountNotExists);
}
}
}
}
catch (TimeoutException)
{
result = EmailAddressStatus.Timeout;
}
catch (Exception e)
{
message = e.Message;
}
finally
{
if (socket != null && socket.Connected)
{
socket.Close();
}
}
}
}
else
{
result = EmailAddressStatus.InvalidDomain;
}
}
else
{
result = EmailAddressStatus.InvalidEmailFormat;
}
return(result);
}
