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Unlimited mailboxes and domains on one $9-a-year plan

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August 31, 2026 Three weeks in, someone put a real domain on it. Outlook put it in spam.

I started this on 10 August. Three weeks later there are 12 people paying for it, 44 domains and 61 mailboxes on the box.

Yesterday one of them moved a live domain over and sent mail by hand to see what would happen. Gmail took it, inbox, faster than they expected. Zoho, same. Outlook and MSN filed it as spam.

That's the honest result of the day. Nothing looks misconfigured. The records all check out on both v4 and v6, IMAP through Thunderbird worked first try. It's reputation, which means it's time, which means there's nothing clever I can ship tonight to fix it. The customer noticed before I did and told me not to chase it, which was kind of them and somehow worse than being yelled at.

Quick context on the product: $9 a year, unlimited mailboxes and domains, 10 GB pooled. One plan. It can be that cheap because a mail server costs storage and bandwidth, not headcount, and everyone else bills you per human anyway.

Working right now: signup, payment, domain verification, webmail, IMAP, and outbound through a relay.

Not working: the IMAP import. Until this morning it could not finish a real mailbox. The biggest thing it ever copied successfully was two messages, and one dropped socket meant the retry duplicated 1,850 of them. I spent today on that, and this same customer is going to be the first person to point it at a fifteen-year archive, so I'll find out soon whether the fix is real.

They'll come back with proper feedback in two to four weeks, after they've lived in it. I'll post what they say, including the parts I won't enjoy.

3 Comments

  1. 1
    This is a painful reminder that technical deliverability and domain reputation will silently kill a product faster than poor user experience ever could. Switching to a custom domain triggers strict spam filters on major email providers, proving that setting up proper DNS authentication (SPF, DKIM, and DMARC) and warming up a brand-new domain from day one are non-negotiable fundamentals for any launch.
    1. 1
      Agreed in general, but my case argues slightly against the standard advice, so it's worth being precise. SPF, DKIM and DMARC were all correct and aligned before the first message went out, and PTR matched in both v4 and v6. Gmail and Zoho took it immediately. Outlook binned it anyway. Authentication is what gets you evaluated, not what gets you delivered. Microsoft is the one big provider where a domain nobody has seen before starts below zero and has to earn its way out with volume that doesn't generate complaints. That's the annoying part: every check you can run is green and the mail is still in the junk folder.
  2. 1
    12 paying customers this early makes the reliability problems much more consequential. Curious whether the bigger risk now is Outlook reputation taking time to improve, or proving the IMAP migration can handle large real-world archives without creating trust-killing duplicates or missed mail.

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I got a $420 Google Workspace bill for five people, and two of them barely used it. A mail server doesn't care about headcount, it cares about storage. So I built one that charges for storage. $9 a year.