Comprehensive and Detailed Explanation:
To validate postal codes and ensure accurate data entry, Salesforce allows the use of the VLOOKUP function within validation rules. This approach involves creating a custom object containing valid postal codes and configuring a validation rule that references this object to verify the entered postal code.
From Coefficient:
"Craft a validation rule employing the VLOOKUP formula on the Accounts object. This rule checks the account's postal code against the ZipCode__c object, leveraging lookup_value and objecttype parameters to ensure accuracy."
-How to Use the Salesforce VLOOKUP Function
By implementing this method, Cloud Kicks can prevent the entry of invalid postal codes, maintaining data integrity across international addresses.