USPS Time in Transit in PostalMate
The USPS does not have a means of exporting estimated time in transit to 3rd party software. In lieu of this, the store is able to enter their own estimates. We encourage stores to use caution regarding optimistic time frames entered. Whatever you enter here, your customer will expect you to deliver on.
Edit > Shipping Carrier > United States Postal Service > Edit > In Services box, select the service you wish to update > Edit > Display tab. There is a 16 character limit, including spaces.