UK Public Sector DMARC Tracker
Every domain in the official .gov.uk register, rescanned every day. NCSC retired Mail Check on 31 March 2026 and named no replacement, so this is what the public sector’s email authentication actually looks like now — not what it was told to do.
The first scan has not completed yet. Figures appear here once it runs.
Search the register
Filter by body type, policy, or where reports are sent. A domain is only listed as having no DMARC after 3 consecutive daily scans returned an authoritative negative.
0 domains match
| Domain | Body type | DMARC | Reports go to | Receives mail |
|---|---|---|---|---|
| No domains match those filters. | ||||
Method
The source list is the official register of .gov.uk domain names published on data.gov.uk, snapshot dated 31 March 2026 — the day Mail Check was retired. Entries that are DNS plumbing rather than organisational domains (validation labels, record hosts) are excluded.
Each domain’s _dmarc TXT record is read directly from public DNS, the same lookup any receiving mail server performs on every message. No mail is sent, no service is connected to, and nothing non-public is accessed.
A failed or timed-out lookup is recorded as a failed measurement, never as an absent record, and does not count towards the 3-scan threshold. A domain leaves the “no DMARC” list on the first scan that finds a record, so an organisation that fixes its configuration stops being listed the next day rather than remaining on a stale page.
Body type is inferred from naming convention, which is imperfect: some councils do not follow one. Treat the split as indicative and use the filters to check any group yourself.
If your domain is listed
Publishing a DMARC record costs nothing and takes one DNS change. Start at p=none with a reporting address so you can see your own mail flows before enforcing anything, then move to quarantine and reject once the reports are clean. Our free DMARC checker shows your current record, and the none-to-reject guide walks through the rollout. You do not need to buy anything from us to do this, and public sector bodies are welcome to cite this page.
Contains public sector information licensed under the Open Government Licence v3.0. Figures on this page are free to reuse with attribution.