Postmark [new] 【EASY - 2025】
Postmark doesn't want you to build a drag-and-drop newsletter campaign. It wants to deliver your "Invoice #1004" receipt to the inbox in under 10 seconds.
Perhaps the most critical function of a postmark is its legal weight. In the United States, the legal concept known as the (or the postal rule) dictates that a document is considered "filed" or "delivered" on the date of the postmark, not the date it is received. postmark
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