Email settings checker
MX, SPF, DKIM, DMARC and blacklists in one go, scored out of nine.
OpenFree domain, email and SSL tools
Find out who holds a domain and when its registration ends, see why mail goes to spam, prepare a certificate request, track down an SSL error on a website or mail server. No sign-up, no payment.
Domain email
Why mail goes to spam and how to set up SPF, DKIM and DMARC.
SPF checker
One record or two, how many DNS lookups and what it does with foreign mail.
OpenDKIM checker
Whether the signing key is published and how long it is, by selector or common ones.
OpenDMARC checker
Whether there is a record, which policy it sets and where reports go.
OpenMX lookup
The domain’s mail servers, their addresses, reverse DNS and encryption.
OpenBlacklist check
Whether a server address or domain is on open spam lists.
OpenSPF generator
Build an SPF record from checkboxes: servers, addresses, mail services.
OpenDMARC generator
A DMARC record with a policy and report address, from monitoring to reject.
OpenDomains and DNS
Who holds a domain, when it expires and where it points.
Domain WHOIS
Who holds a domain, when it expires and its name servers: data straight from the registry.
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