Example: Modify all Priority Mail methods

In this example CSV all shipping methods starting with “Priority Mail” will receive free shipping over $500.

For this to apply, pattern matching will need to be enabled in the shipping settings – the delivery type specified must be in the form <methodname><dot><asterisk>

Note that this specific example will apply to literally all methods starting with “Priority Mail”, which includes “Priority Mail”, “Priority Mail Military”, “Priority Mail Express”, etc.