//---------------------------------------------------------------------------
      // EHLO command request handling.
      //---------------------------------------------------------------------------

      else if(command(input) == "EHLO") {

         if(input.length() > 5) {
            string hostName = input.substr(5);
         }

         else {

            // TODO: Provide error message demanding identity here. 
            // 
         }

         cout << "250-" << getHostName() << CRLF;
         //  cout << "250-STARTTLS" << CRLF;
         //  cout << "250-PIPELINING" << CRLF;
         //  cout << "250-8BITMIME" << CRLF;
         cout << "250-AUTH LOGIN" << CRLF;
         cout << "250 HELP" << CRLF;
         state = "READY";
      }