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Understand Your Sender Score — See how mailbox providers are rating your sending patterns. Get Your Score →

How do mailbox providers measure engagement?

Mailbox providers analyze user actions across millions of inboxes. They store patterns tied to each sender domain and the behavior of individual recipients.

Each open, click, delete, or complaint contributes to a model that predicts how future mail should be treated.

It is a massive silent observation network watching how the harbor responds to each visiting ship.

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