postage cost; mailing cost
Refers to the expense of sending something by mail or courier.
How much is the postage for this parcel?
The mailing cost is included in the product price.
郵便料金 refers to postal rates or fees in general, while 郵送費 emphasizes the cost incurred for a specific mailing.
Compound of 郵送 (mailing) + 費 (cost, expense).