People still use the U.S. Postal Service to pay bills. They still send birthday cards, postcards and political mailers, too.
But the number of people regularly sending first-class mail is dropping, and the amount of time it takes for letters to arrive is getting longer and longer, according to the Postal Service.
Figures from the Postal Service show drops in on-time delivery for first-class stamped mail for the first three months of this year when compared to the same time last year.