What Is the Difference Between First Class, Priority, Priority Express and Certified Mail?
Sending mail is a major part of running a business. But it's not enough to write a great sales letter and just drop it in the mailbox. It's important to know how to send it because the service you choose will affect how much you pay and whether you know for sure it got to the recipient. So before you send the next batch of letters, find out the main differences between First Class, Priority, and Certified mail.