You can select to Block or Quarantine messages based on country of origin or language on the Inbound Settings > Regional Policies page, allowing you to reduce unwanted Inbound emails. Note that these settings apply to all domains you have verified in the Barracuda Email Security Service for processing email, unless you change these settings for a specific domain. In that case, the domain-level settings override the global system settings.
Once you select a country from the drop-down menu and click Add, the ISO code for the selected country displays in the table. For a complete list of country codes, see Country Codes List.
When bulk editing countries for regional policies, use the ISO 3166 alpha 3 code. See the ISO Online Browsing Platform (OBP): https://www.iso.org/obp/ui/#search