mailrun.ai
Pre-warmed architecture

Launch capacity that's already moving.

Pre-warmed domains and inboxes for senders who can't wait through a fresh build. Reserved Microsoft inventory, lower density, and a clean handoff — a cold email launch path measured in days, not weeks.

Time to usable capacityCONTROLLED SENDS DAY 1
Day 1Week 2Week 4
Pre-warmedFresh build

Reserved capacity can begin controlled sending on day one. Full campaign volume still ramps as signals remain healthy.

Buy pre-warmed

Reserve capacity and check out.

$19 / domain / month, including 5 inboxes per domain. Minimum 10 domains. Pick your count at checkout.

5 inboxes / domain
$19/domain/mo

Reserved Microsoft / Azure domains, 5 inboxes each. From $190/mo (10-domain minimum).

5 Inboxes per Domain
Controlled Sending from Day One
No Setup Fee
Buy Pre-Warmed Domains
3 inboxes / domainSold out
$15/domain/mo

The 3-inbox density is currently unavailable.

Unavailable

Join the Waitlist via Contact

Have questions about fit? Book a Planning Call.

What pre-warmed means

Prepared inventory, not a cheaper inbox.

Pre-warmed domains are reserved and prepared ahead of your launch — lower density, Microsoft infrastructure, and a clear handoff. It's launch optionality, still operated with sensible ramping and restraint.

From $19 / domain / month, including 5 inboxes
Minimum 10 domains / 50 inboxes / $190 per month
No setup fee, no long-term contract
Pre-warmed inventory can be purchased directly while capacity is available — book a planning call if you need a larger deployment, custom timing, or help confirming fit
Fresh vs pre-warmed
First Controlled SendFaster
Density5 / domain
InfrastructureMicrosoft / Azure
Buying PathSelf-serve while capacity is available
Who it's for

When the campaign is ready and the clock is running.

Onboarding a New Client

You signed the deal and need sending capacity now, not after a full build cycle.

Working a Launch Deadline

A campaign date is set and waiting through fresh infrastructure creates real drag.

Scaling Faster Than Fresh Allows

You're adding campaigns quickly and need a cleaner path from ready to sending.

How handoff works

Controlled, not mysterious.

01

Select Capacity

Size domains and inboxes to your sending target.

02

Assign Pool

Prepared domains are reserved from inventory.

03

Confirm Sequencer

We align to your tool of choice.

04

Handoff Access

Mailbox credentials and files are delivered.

05

Begin Launch

Ramp volume with discipline from day one.

Need pre-warmed inventory for your next launch?

Reserve capacity and check out in minutes, or book a planning call if you want fit confirmed first.