After NCSC Mail Check
Mail Check has closed. Here is what it did for you.
The NCSC retired its free Mail Check and Web Check services on 31 March 2026 and advised organisations to use a commercial product. If you relied on them, this page is for you.
What you have lost
A view of your website's security from outside
Someone telling you when either slipped
What OuterMark covers
| What you need | In OuterMark |
|---|---|
| SPF, DKIM and DMARC checked | The free check, checks 1 to 4 and 9 to 11 |
| MTA-STS and TLS reporting checked | The free check, checks 5, 6 and 12 |
| Your DMARC reports read for you | DMARC Reports, £29 a month |
| Web security headers and certificates checked | The free check, checks 16 to 30 |
| Told when something changes | Posture Monitoring, £29 a month per domain |
| Someone to fix it | Managed DMARC, or Have us fix it |
The NCSC recommends using a commercial product of this kind. It does not recommend OuterMark or any other named product. The NCSC still runs a free service called Check your cyber security.
Start with the free check.
It reads your SPF, DKIM and DMARC records in about 30 seconds, and tells you where you stand today.