Free tool
SPF, DKIM & DMARC checker
Enter a domain and we will look up its SPF, DMARC, DKIM and MX records — the four settings that decide whether your email reaches the inbox or the spam folder.
Why email authentication matters
SPF
Lists the servers allowed to send mail for your domain. Stops spoofing and spam-flagging.
DKIM
Digitally signs outgoing mail with a private key so receivers can verify it wasn't tampered with.
DMARC
Tells receivers what to do when SPF or DKIM fails, and sends you reports on who is sending as you.
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