Cold email infra
that runs itself

Cold email infrastructure. Claim an inbox from inventory that we already warmed, or connect a domain you own and we warm it for you — either way you get mailboxes on our own mail servers with authentication set up correctly, plus SMTP and IMAP credentials to plug into whatever sequencer you already use. We do not send your campaigns; we make sure the mailboxes they send from actually land.

Price and purpose. Workspace is a productivity suite sold per seat at $16 or more, built for a company’s internal mail, and its abuse systems treat outbound volume from a new tenant as exactly the problem they exist to stop. We run our own mail servers and our own IP blocks, charge about a dollar a mailbox, and the entire system is designed around sending cold.

Yes, and it is not an afterthought. Every action in the dashboard is a REST endpoint on the same operations layer, included on every plan at no extra cost. Anything that touches a registrar, a DNS resolver or a mail server returns 202 with a job you poll rather than pretending to be synchronous.

Run npx -y @emailpal/mcp with an API key and any MCP client gets 29 tools covering domains, mailboxes, warming, the inbox, compliance and jobs. Set EMAILPAL_MCP_READ_ONLY and the mutating tools vanish from the list entirely.

An inbox claimed from inventory is ready when you claim it — the ramp already ran here and the placement number you see on it was measured before you arrived. On a domain you bring, mailboxes exist within minutes and DNS propagation is usually the slowest part at under an hour, then the ramp runs: about a week on the accelerated profile, about two on the standard one. We do not put a date on campaign-readiness, because a date is not evidence. The mailbox is called ready when seed accounts at Gmail, Microsoft and Yahoo have measured enough of its mail reaching the inbox.

The default ceiling is 40 and the hard maximum is 100, but we would rather you did not go near it. Across a large published sample, reply rates were about 5.7% at 20–49 sends a day per mailbox against 1.4% at 100 or more. Sending harder from each mailbox earns less, so the product caps low and sells you more mailboxes instead.

Yes, free, however many your plan has slots for, wherever you registered them. Point the nameservers at us and we write SPF, both DKIM keys, DMARC and MX, then verify the records against public resolvers rather than trusting our own writes.

A mailbox we provisioned on a domain we registered months ago and parked on a plausible landing page, then ran through the same warming mesh your own mailboxes use — months before anyone bought it. It arrives with a finished ramp, a real thread history, and an inbox rate we measured rather than promised. Age is part of it: the domains underneath are 90 days or older. But age on its own only stops a domain looking brand new. The warming is what makes the mailbox usable on day one.

$3 per address per month, with a 90-day minimum term, and they sit outside your plan allowance — leased inboxes are not counted against your included mailboxes. Warming does not stop when you claim one: the mesh keeps running and the seed accounts keep measuring placement for as long as the lease does, at no extra charge. That is the part worth paying attention to when comparing. An inbox that was warm when it left the shelf and has been unmeasured ever since is a different product from one whose inbox rate you can still read today. The minimum term exists because an address sent hard for three weeks and handed back is worth less than the ninety days of parking and warming it took to build.

Yes. Three profiles: standard reaches the ceiling in about two weeks and is the right answer for a fresh domain, accelerated does it in about a week and is meant for domains that already carry history, and no-ramp sends at the ceiling from day one. That last one is available and we will let you pick it, but on a domain with nothing behind it that curve is precisely the pattern that gets you filtered. Whichever you choose, the readiness verdict is still measured rather than assumed.

Shared by default across four pools that never exchange traffic, which is the right answer for almost everyone — a dedicated IP with low volume struggles to build reputation at all. Dedicated addresses are $20 a month on Growth and above if you are running multiple distinct mail streams.

The autopilot handles it. Every address is re-scored hourly per provider, and the worst provider drives the decision. It walks down through watch, throttled, no-new-assignments, draining and quarantine, each with a minimum dwell time, and it comes back up one rung at a time through a recovering state on a fifth of normal traffic. No human has to notice first.

Partly, and we would rather say so. Mesh traffic never leaves our servers, so on its own it builds no reputation at Gmail or Microsoft. What it builds is a plausible correspondence history and an engagement signal. Real provider reputation comes from the seed sends, which do leave, and from your actual campaigns — which is why the number we show you is measured placement rather than volume sent.

Anyone sending to scraped or unverified lists, anything in the fraud and adult categories, and anyone who reads a deliverability guarantee as permission to ignore it. Every tenant is risk-scored, lists can be verified before they cost anyone an IP, and accounts that burn shared reputation get throttled and then removed.