Postmark 【Full — 2025】

Postmark can receive emails for you and convert them into JSON to send to your application via a webhook.

At its simplest, a postmark is an official marking applied by a postal service—most commonly the USPS (United States Postal Service), Royal Mail, or Canada Post—on a piece of mail. It typically contains three critical pieces of data: postmark

Historically applied with a physical rubber stamp and ink pad (known as a "handstamp"), most modern postmarks are applied via high-speed cancellation machines. These machines do two things simultaneously: they "cancel" the postage stamp (marking it so it cannot be reused) and imprint the postmark details. Postmark can receive emails for you and convert

In today's digital age, the role of postmarks might seem diminished. However, they still serve a critical function: Historically applied with a physical rubber stamp and

Beyond law, the postmark is the soul of philately (stamp collecting). While beginners focus on the stamp design, advanced collectors chase "postal history"—the journey of the letter. The postmark tells that story.