The U.S. Postal Service is raising shipping and stamp prices. Bulk mailing companies say the increase is too high.

The cost of postal stamps increased by 5 cents on July 13, marking the sixth time the U.S. Postal Service has increased stamp prices since January 2021.

The Postal Service raised stamp prices Sunday as part of a 10-year plan to stabilize finances and modernize operations.

A print for the USPS Emancipation Proclamation Forever Stamp. The rectangular sheet has a yellow background and is covered in text in black ink that reads [HENCEFORWARD / SHALL BE / FREE / ...