private static bool emailServerLookup(string server)
{
IPAddress[] mx;
try
{
mx = Dns.GetResolvedMXRecords(server);
}
catch (Win32Exception w32e)
{
Log.Instance.HandleException(w32e, LogLevel.Debug);
return(false);
}
if (mx.Length == 0)
{
return(false);
}
foreach (IPAddress record in mx)
{
SmtpClient smtp = new SmtpClient(record);
try
{
if (smtp.Connect().ResponseCode == SmtpResponseCode.ServiceReady &&
smtp.Hello().ResponseCode == SmtpResponseCode.Completed)
{
return(true);
}
}
catch (ApplicationException)
{
continue;
}
}
return(false);
}
private static bool emailDNSLookup(string server)
{
IPAddress[] mx;
try
{
mx = Dns.GetResolvedMXRecords(server);
}
catch (Win32Exception w32e)
{
Log.Instance.HandleException(w32e, LogLevel.Debug);
return(false);
}
return(mx.Length > 0);
}
