The newzbin block will only stop the website from being visible, it will in no way interfere with grabit communicating with giganews.. If NBZ files are not working there could only be four things wrong.
- The NBZ files are corrupting in some way (load one into a text editor as they are only XML)
- Grabit is misconfigured in some way (uninstall, reinstall and reconfigure)
- Something on the system (firewall..etc...) is blocking the ports (but you said other ports have been tried.. Have though you tried non-ssl ports? (119)
- His giganews account or the giganews service has an issue