Domain Health · free checker
Is your domain's email set up right? Find out in ten seconds.
Type a domain. We read its SPF, DKIM, DMARC and MX records and tell you, in plain English, what's broken and exactly how to fix it. No signup.
Why it matters
Since 2024, Google, Yahoo and Microsoft expect senders to publish SPF, DKIM and DMARC. Without them, your invoices and newsletters are more likely to land in spam, and anyone can send mail pretending to be you.
Fixes, not jargon
Every problem comes with a specific next step: which record to change, what to change it to, and why. You can hand the results straight to whoever manages your DNS.
Know when it breaks
Records change: a new tool adds an SPF include, a DKIM key gets rotated, a certificate lapses. Monitoring checks for you and emails you when something changes, confirmed by a second check.
Every free checker
SPF checker →
Syntax, the 10-lookup limit, nested includes, and how strictly unlisted senders are treated.
DKIM checker →
Finds your key at common selectors or the one you name, and checks its type and strength.
DMARC checker →
Policy, reporting addresses, external-report authorization, and the safe path to p=reject.
MX checker →
Mail servers, priorities, broken hostnames, and which provider handles your mail.
SSL certificate checker →
Whether HTTPS works, and when the current certificate expires.
Domain expiry checker →
Registration end date, registrar, and transfer-lock status from the registry.
Monitoring for one domain is free
Add a domain and we'll check it weekly and email you if a record changes or breaks. Paid plans check daily or hourly, cover more domains, send alerts to Slack or any webhook, watch SSL and domain expiry, and give agencies white-label report pages for clients.