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Free email and domain tools
Check one part of a domain's email set-up in detail, or build a record from scratch. Every tool is free, needs no sign-up, and keeps no record of what you check.
Check one record
- DMARC checkerSee a domain's DMARC policy in plain English, and where its reports go.
- DMARC record generatorBuild a correct DMARC record in a minute, with each setting explained.
- SPF checkerCount an SPF record's DNS lookups against the limit of 10, include by include.
- DKIM checkerFind a domain's DKIM keys, with or without the selector, and check their size.
- MTA-STS checkerCheck the MTA-STS record, the policy file and its certificate, and the MX match.
- TLS-RPT checkerSee whether a domain asks for TLS reports, and where they go.
Run every check on every client, every day.
Start a free 28-day trial: up to 3 domains, no card needed.