An infrastructure consultancy with nothing to sell you but the work.

The one thing that defines us

Most companies that touch email deliverability have something to sell underneath the advice — an ESP seat, an MTA licence, a monitoring subscription, a managed platform with margin built in. That product shapes the recommendation, whether or not anyone intends it to. We built this consultancy the other way around. We do not sell an MTA, we do not resell licences, and we do not run a platform you have to rent. We are paid for the work, which means the only thing our advice has to optimise for is whether your mail reaches the inbox.

It sounds like a small distinction. In practice it changes every answer. When a sender with a PowerMTA estate asks whether to migrate, an MTA vendor has a stake in the reply and we do not. When the honest recommendation is to keep what you have and fix two settings, we can give it, because there is no licence on the other side of the conversation. Independence is not a slogan here; it is the business model.

What independence means in practice

KumoMTA is open source and free; PowerMTA is licensed by Bird. We operate and advise on both and resell neither. You own your licences and your infrastructure, and we work on top of them — as an audit, a migration, or an ongoing operation, billed as the work it is. The contrast we run into most often is with enterprise deliverability firms whose pricing arrives only by private quote and whose methods stay behind a curtain. We price transparently for the mid-market, attribute our sources on the page, and explain what we are doing while we do it. A sender should be able to understand their own infrastructure, not be made dependent on the only people who can read it.

How we work

Every engagement starts the same way, with a free 25-point audit of your configuration, reputation and inbox placement. It produces a written assessment with findings in priority order and the cost of fixing each, which tells both sides exactly what we are dealing with before any money changes hands. From there the work is whatever the audit found: a migration, a round of tuning, an authentication project, a blacklist recovery, or an ongoing managed operation. We make changes surgically and on your timeline, and we are equally willing to hand the fixes to your own team as to run them ourselves. Nothing about the model depends on locking you in.

Who we work with

Our clients are senders for whom email volume is serious enough that the infrastructure matters: companies running a PowerMTA estate, ESPs and platforms sending on behalf of others, and businesses meeting the 2026 bulk-sender rules at Gmail, Yahoo and Microsoft for the first time. Many of them sit in an awkward middle — too large to treat deliverability as a checkbox, not large enough to find the opaque enterprise consultancies a comfortable fit, and not willing to gamble production mail on a do-it-yourself migration. That is the gap we were built for.

Where we work, and in which languages

The team spans European, North American and Latin American time zones, and works in English, German, Spanish and Portuguese. The last two matter more than they should have to. Deliverability expertise at this level is overwhelmingly English-only, which leaves Spanish- and Portuguese-speaking senders — a large and growing share of global email — underserved by the firms most likely to be able to help them. Covering those languages properly is a deliberate part of what we do, not an afterthought bolted onto an English practice.

Credentials

Deliverability is a field where membership and certification reflect real standing with the bodies that shape the rules, so we hold and maintain the ones that matter.