Command not implemented. The server response was: 5.5.1

Hi,

About your question "if i want to disable antivirus throw programmatically in asp.net C# then is it possible?"

Yes possible if you have sufficient privileges

if you are using any anti-virus, they use Windows service to process on virus or any other activity(like email sending in your case).

you need to stop this service then your anti-virus will also disabled.

using (ServiceController controller = new ServiceController("YourServiceName", "YourMachineName"))
           {
               if (controller.Status != ServiceControllerStatus.Stopped)
               {
                   controller.Stop();
                   controller.WaitForStatus(ServiceControllerStatus.Stopped);
               }
           }

Hope this will help you,

Thanks
-amit.