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Sending Velocity

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Authentication
DNS
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Warmup
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Inbox Placement

Sending Velocity

How quickly volume increases relative to recent sending history.

Reading time:: 5 min
Difficulty:: Intermediate
Estimated duration:: 5 min
Prerequisites:: Daily Sending Volume
Last updated:: 2026-07-15
Author:: empire

Definition

Sending velocity measures the rate of change in traffic; abrupt acceleration is a common filter trigger.

Prerequisites

Daily Sending VolumeMessages sent per day for a domain or IP — the primary warmup control unit.

Daily Sending VolumeMessages sent per day for a domain or IP — the primary warmup control unit.
WarmupControlled introduction of sending volume so mailbox providers learn to trust a domain or IP.

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