Free tool
Check a domain's email setup.
Type a domain. We look up its MX, SPF, DKIM and DMARC records in public DNS, explain each one in plain words and show the fix. Works for your domain or for an account you plan to email.
Result
What this check does not tell you
- This check reads public DNS records. It does not send an email and cannot see one you sent.
- It does not predict inbox placement or spam folder rates.
- It does not check sender reputation or blocklists.
- It does not see your bounce (Return-Path) domain, so an SPF record there is not checked.
- It counts the DNS lookups of a, mx and exists in SPF but does not resolve them.
- It finds DKIM keys only at the selectors listed.
- Whether a BIMI logo shows is up to each mailbox provider.
To test where your emails land, try Folderly's inbox placement test. To check the words in a draft, try Folderly's spam words checker.
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How to read this
MX
MX records tell other servers where to deliver mail for a domain. Without them, replies to anyone at the domain can be lost. The host names often show which provider or secure email gateway receives the mail.
MX in the glossarySPF
SPF lists the servers that may send email as a domain. There must be one record, and it may use at most 10 DNS lookups; past 10, SPF fails as an error.
SPF in the glossaryDKIM
DKIM is a key in DNS that receivers use to check a message's signature. Keys sit at names called selectors, which cannot be listed from DNS, so we try the common ones and any you add.
DKIM in the glossaryDMARC
DMARC tells receivers what to do with mail that fails SPF and DKIM: p=none watches, p=quarantine sends it to spam, p=reject refuses it. Its rua address receives daily reports that show who sends as the domain.
DMARC in the glossary