IP Warmup: why a new IP can’t send everything at once

<p>A store changes its IP and wants to send 50,000 emails today. Without a sending history, email providers may limit or block that traffic.</p> <p>Think of a new credit card. The bank starts you with a low limit, and it grows as you build trust. A new IP works the same way.</p> <p><strong>Reputation:</strong> providers look at volume, bounces and complaints, then decide to deliver, limit or block

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