Custom Shipping Rule

To use a manual shipping method as a shipping rule, you need to first create a custom shipping method.

Create a Custom Shipping Method

• Go to Connection > Shipping Carriers

• Click Add Carrier and select Custom shipping method
  

Choose the name for the custom shipping method 

Create a Shipping Rule

• Go to Settings > Shipping Rules > New Shipping Rule
  

• Define your requirements (e.g., weight, destination, SKU, etc.)

• Under Shipping Method, select the custom method you created (Mailstamp)

Once saved, the rule will automatically apply the Custom shipping method to orders that match the conditions you specified.