It’s been decades since email and the internet overpowered the written letter. But given how things have changed, San Francisco is now making some changes in reaction to the lack of mail its citizens are sending.

Per Hoodline, the U.S. Postal Service removed 40 mailboxes from San Francisco streets in April due to underuse.

Augustine Ruiz of USPS' Corporate Communications Department told Hoodline that any mailbox that receives less than 25 pieces of mail a day is considered underused and has been removed. The goal in removing the mailboxes is to concentrate higher volumes of mail in other boxes around town. 

Starting in mid-March, users found a notice of closure taped to the front of those underused mailboxes. It read, “due to the insufficient mail volume generated in this collection box, effective Wednesday, April 19, 2017, the collection box will be permanently removed from this location.”

Ruiz noted that postal workers are constantly checking mailbox density to determine overall use per box.

Neighborhoods that were affected by this mailbox purge include Anza Vista (six),

Pacific Heights (five), Lone Mountain (four), Russian Hill (four), Inner Richmond (three), and Western Addition (three). The other 15 were taken sporadically throughout the city.