About LetterDuck

LetterDuck was built by a small media company that wanted email on its own domains without paying for every address by the seat.

That company is CoolDuckMedia. We run small media sites, and each one needs mail: a hello@, an editor@, a tips@, a newsletter that goes out on schedule. Per-seat email pricing treats each of those addresses as an employee. On a media site an address is a purpose, not a person, and the arithmetic turns silly fast.

So we built the tool we could not buy: one workspace where every address on the domain lands in a shared inbox, replies go out from whichever address the conversation belongs to, the newsletter sends from that same domain, and the deliverability work happens underneath instead of being your second job.

We ran it on our own mail first

In June 2026 we moved a real site's entire mail onto LetterDuck. Every address, the newsletter, the lot. Not a staging tenant with test data: the actual inbound, the actual subscriber list, the mail we answer every day.

Running your own product on mail you actually need earns its keep fast. That same month we discovered Gmail had been silently rejecting 73% of the mail we mirrored through standard forwarding, because forwarding breaks DMARC alignment. Nothing errored on our side. The mail simply vanished. We measured the damage in our own logs, rebuilt the path, and then built monitoring so nothing on this system can vanish quietly again.

That monitoring still runs. Every 2 hours a canary message travels the full production path: DNS, mail routing, the parser, the database. If it fails to round-trip, the watchdog emails the owner. Silence means healthy. We judge the system's health the same way you would: by whether the mail arrives.

What LetterDuck is, and is not

LetterDuck is email, done properly: an inbox for every address on your domain, and a newsletter that sends from that domain with the deliverability guardrails already in place. The price is flat, $50 per domain, because an address is a routing rule and we see no reason to bill it like a seat.

It is not a docs suite, and it is not video calls. Plenty of good companies sell those. We are not one of them, and we do not plan to become one. A tool that does one thing can afford to do it properly.

Where things stand

LetterDuck is live and in waitlist mode. We onboard slowly on purpose: sending reputation is earned domain by domain, and a workspace that promises the inbox instead of the spam folder should not take on customers faster than it can keep that promise.

How we write about mail (the numbers policy, the no-affiliate rule, the corrections address) lives in our editorial standards. The short version: we publish what we run, and nothing on this site is paid for by anyone but us.

The name, since you will wonder: a duck looks calm on the water while paddling hard underneath. That is the job description of mail infrastructure, and we liked the honesty of it.

If you want email on a domain you own, put your name on the waitlist. We take domains in order, and we will tell you plainly when yours is up.