Free domain diagnosis
Enter a domain and run the free check.
What this diagnosis does
It only reads public information
We look at what your domain already publishes on the internet: its DNS records, the site certificate and public reputation lists. The same thing any visitor — or any mail server writing to you — already sees.
We ask for no access
No username, no password, no logging into your DNS panel or hosting provider. Nothing to install and nothing to authorise.
It changes nothing
The diagnosis does not touch your domain. If we find something wrong we tell you what it is and how to fix it; whether to apply it is your call.
We check six areas: email authentication (SPF, DKIM, DMARC), SSL certificate, DNS, mail servers, blocklists and site availability.
Free, no sign-up. It takes under a minute.
