Pre-warmed vs fresh: which path fits your client launch

Every outbound launch faces the same scheduling fact: fresh infrastructure needs preparation and a controlled ramp before it carries meaningful campaign volume. Usually that is fine because the ramp is part of the plan. Sometimes the client has signed, the campaign has a date, and the calendar does not leave enough runway.

What fresh gets you

Fresh infrastructure is the clean-slate path: new domains, no history, prepared under your program's own operating plan. It is the right default when timelines allow because the domain's history begins with your deployment.

The cost is time. Preparation is not a formality. Mailrun recommends at least two weeks before controlled campaign sending, followed by a staged increase rather than an immediate move to full volume.

What pre-warmed changes

Pre-warmed domains are prepared in advance on Mailrun infrastructure before they are assigned to a customer. Because the domains are prepared in advance, controlled sending can begin on day one, although full campaign volume still ramps.

The warm-up work was completed before the inventory was offered.

Two things to understand about the model:

• Inventory is finite. Prepared domains exist because they were built ahead of demand. Available inventory can be purchased directly, while larger or custom deployments may need planning assistance.
• The economics are per-domain: $19/domain/month including five inboxes, with a ten-domain minimum. You're paying for time already invested in the asset.

Choosing between them

Timeline is the honest deciding factor. With enough runway, choose fresh infrastructure and let preparation run its course. With a committed date inside that window, pre-warmed inventory provides a controlled fast lane. Plenty of agencies use both: fresh as the standing program and pre-warmed for time-sensitive onboarding.

Choose based on the available runway

The choice depends primarily on timing. Fresh domains build history under your own program. Pre-warmed inventory provides access to preparation completed before purchase, which can shorten the path to controlled sending.

Check current pre-warmed availability.