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Warm up a new sending domain automatically

Set a daily growth policy on a verified domain and campaign volume ramps up in 24-hour windows, held back if bounces or complaints climb.

A new domain has no sending history, so campaign volume should rise gradually. Tell Samva whether the domain is new, migrating, or returning, pick a starting volume and a growth rate, and it ramps up for you. If bounces or complaints climb, it holds back until things settle.

Receipts and password resets are never delayed. Only campaign runs wait. A run waiting for capacity says so and continues in the next window. If bounces or complaints hold the domain, the run stays paused until you resume the plan once the rates are back under the limits.

Find it under Domains → Warming, or use the API, the SDK, or MCP. See Warm up a sending domain.