public string[] GetMXRecords(string domain)
{
IntPtr ptr1 = IntPtr.Zero;
IntPtr ptr2 = IntPtr.Zero;
MXRecord recMx;
if (Environment.OSVersion.Platform != PlatformID.Win32NT)
{
throw new NotSupportedException();
}
ArrayList list1 = new ArrayList();
int num1 = DnsMx.DnsQuery(ref domain, QueryTypes.DNS_TYPE_MX, QueryOptions.DNS_QUERY_BYPASS_CACHE, 0, ref ptr1, 0);
if (num1 != 0)
{
throw new Win32Exception(num1);
}
for (ptr2 = ptr1; !ptr2.Equals(IntPtr.Zero); ptr2 = recMx.pNext)
{
recMx = (MXRecord)Marshal.PtrToStructure(ptr2, typeof(MXRecord));
if (recMx.wType == 15)
{
string text1 = Marshal.PtrToStringAuto(recMx.pNameExchange);
list1.Add(text1);
}
}
DnsMx.DnsRecordListFree(ptr1, 0);
return((string[])list1.ToArray(typeof(string)));
}
static void Main(string[] args)
{
string strHostName = Dns.GetHostName();
Console.WriteLine("Local Machine's Host Name: " + strHostName);
DnsMx mx = new DnsMx();
string[] hosts = mx.GetMXRecords("breakermind.com");
foreach (var host in hosts)
{
Console.WriteLine(host);
IPAddress[] ips = Dns.GetHostAddresses(host);
foreach (IPAddress ip in ips)
{
Console.WriteLine(" {0}", ip);
}
Console.ReadKey();
}
}