From Address
Out of the box, Endicia for Mac lists two addresses; the one you signed up with (Endicia Account Address) and the Apple Address Book's built-in "Me" card (My Address Book Card).
You can select, edit, add and delete addresses using the From address pop-up.
Editing addresses is simple, and each address can have its own graphic associated with them. The phone number field is required for International shipments. And you can select "Standardize" to use Endicia's built-in address verification technology to standardize your shipping address to postal regulations. This step is not required for From addresses.