Can I check if an email address exists using .net?

Question

Ive seen some php examples of how you can ping an inbox(without sending any mail to it) to check whether it exists. I was wondering if anyone knows if this is possible with

Answer 1

protected bool checkDNS(string host, string recType = "MX")
{
    bool result = false;
    try
    {
        using (Process proc = new Process())
        {
            proc.StartInfo.FileName = "nslookup";
            proc.StartInfo.Arguments = string.Format("-type={0} {1}", recType, host);
            proc.StartInfo.CreateNoWindow = true;
            proc.StartInfo.ErrorDialog = false;
            proc.StartInfo.RedirectStandardError = true;
            proc.StartInfo.RedirectStandardOutput = true;
            proc.StartInfo.UseShellExecute = false;
            proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            proc.OutputDataReceived += (object sender, DataReceivedEventArgs e) =>
                {
                    if ((e.Data != null) && (!result))
                        result = e.Data.StartsWith(host);
                };
            proc.ErrorDataReceived += (object sender, DataReceivedEventArgs e) =>
                {
                    if (e.Data != null)
                    {
                        //read error output here, not sure what for?
                    }
                };
            proc.Start();
            proc.BeginErrorReadLine();
            proc.BeginOutputReadLine();
            proc.WaitForExit(30000); //timeout after 30 seconds.
        }
    }
    catch
    {
        result = false;
    }
    return result;
}