# Free email tools

> Verify an email address, check SPF, DKIM and DMARC, explain SMTP errors and generate SPF and DMARC records. Free, no sign-up, also by API and MCP.

- [Free email verifier](https://couryo.com/en/tools/email-verifier.md): Check whether an email address is valid before you send. Catches typos (gmial.com, hotmail.con), domains that receive no email and disposable inboxes. Free, no sign-up.
- [SPF, DKIM and DMARC checker](https://couryo.com/en/tools/domain-checker.md): Check your domain's SPF, DKIM, DMARC and MX for free, with a 0 to 100 score, what to fix in plain words and the record ready to copy.
- [SMTP error explainer](https://couryo.com/en/tools/smtp-error-explainer.md): Paste the error or bounce message (550 5.7.1, 5.1.1, 4.2.2, 5.7.515...) and see in plain words what happened, whose problem it is and what to do next.
- [SPF record generator](https://couryo.com/en/tools/spf-generator.md): Build your domain's SPF record in seconds, with the services that send for it, without going over the 10 lookup limit. Free, right in your browser.
- [DMARC record generator](https://couryo.com/en/tools/dmarc-generator.md): Build your domain's DMARC record, from p=none to p=reject, with the report address. Free, right in your browser, with the steps to raise the policy without losing email.