Domain monitoring for agenciesEvery client domain. Under control.
DomainWarn monitors website, DNS, MX, SPF and DMARC of your client domains in one dashboard and tells you when something changes, before the client calls.
14 days free with every feature, no credit card. From €19 per month afterwards. The tools stay free for one-off checks.
- Hosted in Germany
- GDPR compliant, DPA on request
- Proper VAT invoice
- Cancel monthly
What DomainWarn checks
Not just uptime, but the whole technical state
Change detection
Detects when MX, SPF, DMARC, DNS records or name servers change, confirms the change against a second name server and shows before and after.
Incidents instead of mail floods
Related problems become one incident, with reminders instead of constant noise. When it recovers, you get exactly one all-clear.
Daily digest
Every morning one email with the state of all client domains: what is new, what is open, which certificates expire soon.
Built for agencies
Organisation, clients, domains. 100 client domains in one overview, members with roles, audit log.
Channels of your choice
Email, signed webhooks, Slack, Discord and Telegram. Overridable per client or per domain.
Authoritative queries
DNS is checked directly at the authoritative name server, not through a resolver cache. What you see is the current state of the zone.
Why not just an uptime tool?
Uptime tools see whether the site responds. DomainWarn sees what changed.
Most outages clients report are not outages: mail does not arrive because someone touched the SPF record, or the domain points nowhere after a hosting move. An uptime check is green the whole time.
An uptime tool reports
- Website does not respond
- Certificate has expired
DomainWarn also reports
- The client switched hosting yesterday, the nameservers are new
- The SPF record has been invalid since the newsletter tool changed
- DMARC is missing or set to none, mail lands in spam
- MX points to a different provider than last week
- The certificate expires in nine days, before it has expired
- The domain expires in 30 days or has been transferred
How it works
- 1
Add domains
Create clients, add or import domains. Monitors for HTTP, SSL, DNS, MX, SPF and DMARC are created automatically.
- 2
Checks run
Every few minutes DomainWarn checks each domain and stores DNS snapshots. No agents, nothing to install at the client.
- 3
Learn about changes
On changes or outages an incident is created and you get a message through your channel.
Free tools, no sign-up
The same checks DomainWarn runs for you in the background, for a single domain right in the browser.
SPF Checker
Free SPF record check and lookup: syntax, includes, the 10 DNS lookup limit and the closing qualifier. Shows whether your domain blocks forged senders.
Open tool →DMARC Checker
Free DMARC record check and lookup: policy (none, quarantine, reject), pct, reporting addresses and syntax errors. With recommendations for moving to p=reject.
Open tool →DNS Checker
Free DNS lookup straight from the authoritative name server: A, AAAA, CNAME, MX, TXT, NS and CAA records at a glance. No sign-up, every record explained.
Open tool →MX Checker
Free MX lookup: which mail servers receive for a domain, do they resolve, is the priority right? Detects missing and unreachable mail servers.
Open tool →SSL Checker
Free SSL certificate check: expiry date, issuer, chain, host name, alternative names and TLS version. Detects expired, self-signed and mismatched certificates.
Open tool →HTTP Header Checker
Free HTTP header check: HSTS, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy and Permissions-Policy with recommendations.
Open tool →Redirect Checker
Free 301 redirect check: every hop with status code and response time, from http to https, from www to non-www. Detects redirect chains, loops and 302s.
Open tool →DKIM Checker
Free DKIM record check and lookup: selector, key type, key length, syntax and revoked keys. Leave the selector empty to try common selectors automatically.
Open tool →DNSSEC Checker
Free DNSSEC test: DS record, resolver validation and broken signature chains. Shows whether validating resolvers like Google or Cloudflare reach your domain.
Open tool →MTA-STS Checker
Free MTA-STS check: DNS record, policy file, mode, max_age and whether your MX servers are covered. Shows whether inbound mail enforces TLS.
Open tool →TLS-RPT Checker
Free TLS-RPT record check: syntax, reporting addresses (rua) and common errors such as a missing record. Shows whether you get reports on TLS failures.
Open tool →BIMI Checker
Free BIMI record check: syntax, logo URL, SVG Tiny PS, VMC certificate and the DMARC prerequisite. Shows why your logo does not appear in Gmail.
Open tool →Blacklist Check
Free IP blacklist and domain blacklist check: mail server IPs, website IP and domain against Spamhaus, Spamcop, Barracuda, PSBL and SURBL. With delisting links.
Open tool →Domain Checker
Free domain check: expiry date, registrar, EPP status, transfer lock and name servers straight from the registry via RDAP. Warns about expiry and holds.
Open tool →Who DomainWarn is for
Web agencies, freelancers, web developers and IT service providers who look after many client domains and want to know when a client switches hosting, someone breaks the SPF record or a certificate expires. No server monitoring, no agents, no configuration at the client.
Try 14 days for free