Postmark uses a straightforward credit-based system rather than charging per email address stored.
You cannot send an email from Postmark until you verify you own the domain (e.g., you@yourcompany.com). postmark
No hidden fees for open/click tracking, webhooks, or support. You cannot send an email from Postmark until
In the legal world, the date on a postmark is king. The "Mailbox Rule" (common in contract law) states that a document is considered filed or accepted on the date it is postmarked, not the date the recipient receives it. If your tax return is due on April 15th, as long as the postmark on the envelope reads "April 15th" (or earlier), the IRS considers it on time—even if it arrives a week later. This single stamp prevents millions of dollars in late fees annually. In the legal world, the date on a postmark is king
You can write HTML emails directly in your code, or use Postmark’s template editor.
If you need a clear, legally valid postmark, follow these five steps:
Collecting stamps is called Philately. Collecting postmarks is called Marcophily. Marcophiles aren't interested in the stamp's perforations or glue; they care about the ink ring around it. A postmark from a town that no longer exists (a "ghost town" cancel), a ship at sea, or the first day of issue for a stamp can turn a simple envelope into a rare artifact.