Email Security
Email Security Checker
SPF, DKIM and DMARC in one report, with plain-language fixes for whatever is missing.
No signup required • Fast DNS lookup • Privacy-focused
The three records that matter
SPF lists who may send for you. DKIM signs your mail so receivers can verify it. DMARC ties the two together and tells receivers what to do when they fail.
Together they decide whether your mail lands in the inbox — and whether someone else can send convincing email in your name.
Where to start
Get SPF to a single valid record, enable DKIM signing with your provider, then publish DMARC at p=none and tighten it once reports are clean.
Frequently asked questions
More free tools
DNS CheckerInspect every published DNS record for a domain.DNS LookupRaw A, AAAA, MX, TXT, NS, CNAME, SOA and CAA lookups.MX CheckerConfirm the mail servers that receive your email.SPF CheckerValidate the SPF record that authorises your senders.DKIM CheckerLook up the DKIM key published at your selector.DMARC CheckerRead your DMARC policy and reporting setup.