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Free Email Security Tool
Instantly look up SPF, DKIM & DMARC DNS records for any domain. Catch misconfigurations before they hurt your deliverability.
Free forever · No account needed · 50+ DKIM selectors scanned
A silent SPF or DKIM change can quietly send your emails to spam for weeks before anyone notices. Drop your email and we'll alert you the moment something looks off, so you fix it in minutes, not after a deliverability cliff.
Check every aspect of your email infrastructure
Mailsoftly handles SPF, DKIM & DMARC automatically. Campaigns, automation, and analytics in one place.
Free to start with your Google Workspace account. No credit card required.
This free SPF, DKIM, and DMARC checker looks up all three email authentication records for any domain and shows which ones pass and which fail. SPF passes when a single DNS TXT record starts with v=spf1 and lists every server allowed to send your mail. DKIM passes when the public key published at selector._domainkey matches the signature on your messages. DMARC passes when a TXT record at _dmarc.yourdomain starts with v=DMARC1 and sets a policy of none, quarantine, or reject. If any of the three fails, mailbox providers like Gmail and Outlook are more likely to send your email to spam or reject it outright.
A failing DMARC check usually means one of three things: there is no TXT record at _dmarc.yourdomain, the record does not start with v=DMARC1, or SPF and DKIM do not align with your sending domain. Until DMARC passes with a policy of quarantine or reject, attackers can spoof your domain and providers may filter your legitimate mail. Add or fix the _dmarc TXT record, start with a policy of none to monitor, then move to quarantine or reject once SPF and DKIM pass.
