Privacy
Opaque Research LLC · last updated 16 September 2026
This document is not final. The technical statements below — what we store, for how long, and who it is shared with — are accurate and describe what the service actually does. The surrounding legal language has not yet been reviewed by a lawyer. We would rather publish what we can stand behind now than wait and tell you nothing.
What we collect, and why
Running dynamic DNS means handling two things that identify you: your email address, which is how you sign in and how we reach you, and the IP addresses your machines connect from and publish, which is the service itself. We cannot provide dynamic DNS without them.
How long we keep it
| What | Kept for |
|---|---|
| Update history, including the address each update came from | 7 days on a trial, 90 days on a paid plan |
| Refused signup attempts, where an anti-abuse rule fired | 30 days |
| Your account and your DNS records | Until you delete them |
| Records of abuse we acted on | Kept while a case is open and after it is resolved — see below |
Those windows are enforced by scheduled jobs, and the numbers above are read from the same code that enforces them rather than written here by hand.
What we never do
We do not sell your email address or your addresses to anyone. We do not send you marketing you did not ask for. We email you about your own account — a hostname that stopped updating, something that needs your attention, a change to these terms.
Who else handles your data
Providing the service means some data reaches companies we rely on:
- › Amazon Web Services — the DNS itself. Your hostnames and the addresses they point at are published there, because that is what publishing DNS means.
- › Postmark — email delivery. Your address, so we can reach you.
- › watch4.me — monitoring and alerts, if you use them.
- › Paddle — payment, once billing is live. They are the merchant of record; we never see your card details.
Abuse data
This is the part most services leave vague, so we will be specific.
When we investigate a report of misuse, the data supporting that investigation is kept while the case is open and through its resolution — including, where the case is substantiated, after the account is closed. Evidence that disappears when someone deletes their account is not evidence.
Only data from accounts we have found to be abusive and acted on may ever leave this service. Nothing derived from a legitimate or paying customer is shared with anyone, in any form, aggregated or otherwise. If we report a case to a network operator, the report contains what we observed about that account and nothing about anyone else.
Your rights
You can ask for a copy of your data, or ask us to delete it. Email privacy@closetserver.com. Self-service export and deletion are being built; until they exist, a person will do it for you.
One exception, stated plainly: deleting your account does not delete records of abuse we have already acted on. Everything else goes.