Warm-up tools charge $25-50/mo and feel like a black box. InbXr gives you a free dashboard to log daily volumes, track progress, and know exactly when your domain is ready to scale. Warming up correctly is how new domains build Signal 04 (Domain Reputation) and let Signal 06 (Authentication) age into trust.
Follow this daily volume ramp. Jumping ahead or spiking volume is the #1 reason domains get blacklisted during warm-up.
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