Free Email Security Tools
Instantly check email DNS, blacklist status, and deliverability signals for any domain, or generate ready-to-copy SPF and DMARC records.
SPF CheckerCheck your domain's SPF record instantly. Validate SPF syntax, see authorized senders, and find misconfigurations that allow email spoofing.DNS CheckerCheck the DNS records that affect email delivery: SPF, DMARC, DKIM, MX, MTA-STS, TLS-RPT, and BIMI in one public report.Blacklist CheckCheck whether your domain mail servers appear on common DNS blacklists and review the authentication records that affect sender reputation.Deliverability TestTest the DNS and transport signals that affect email deliverability, including SPF, DMARC, DKIM, MX records, STARTTLS, and policy strength.DMARC GeneratorGenerate a ready-to-copy DMARC TXT record for your domain, including policy, aggregate reporting address, and safe monitoring defaults.SPF GeneratorGenerate a ready-to-copy SPF TXT record and flatten existing SPF includes into IP mechanisms when your domain is close to the 10-lookup limit.DMARC CheckerAnalyze your domain's DMARC record. Check policy mode (none/quarantine/reject), alignment settings, reporting addresses, and get recommendations to strengthen email security.DKIM CheckerLook up DKIM records for all common selectors on your domain. Verify key length, algorithm, and detect weak or missing DKIM signatures.MX CheckerLook up your domain's MX records and verify mail server configuration. Check STARTTLS support, TLS version, and certificate validity for each inbound mail server.DMARC for HubSpotSet up DMARC for HubSpot marketing email with the SPF, DKIM, alignment, and reporting checks needed for Google and Yahoo sender requirements.DMARC for MailchimpConfigure DMARC for Mailchimp campaigns with DKIM authentication, SPF checks, report monitoring, and safe enforcement steps.DMARC for KlaviyoSet up DMARC for Klaviyo flows and campaigns with branded sending domains, DKIM alignment, DMARC reporting, and enforcement planning.Google/Yahoo ChecklistCheck the email authentication requirements bulk senders need for Gmail and Yahoo, including SPF, DKIM, DMARC, alignment, TLS, and unsubscribe readiness.BIMI Setup ChecklistPrepare for BIMI with the required DMARC enforcement, DNS record, SVG logo, and certificate checks before publishing a brand logo for email.