Free tools
Free email tools.
Check the DNS records that decide whether your email reaches the inbox, and whether an address is worth sending to. No sign-up, and everything runs in your browser.
- SPF checker Look up a domain's SPF record, count its DNS lookups across every include, and find the mistakes that make receivers ignore it. Open
- DKIM checker Enter a domain and a selector to look up the DKIM public key, check it's valid, and see its size. Open
- DMARC checker Look up a domain's DMARC record and see its policy, where reports go, and what to change next. Open
- MX checker List the mail servers that receive email for a domain, in priority order, and check that each one has an address. Open
- DMARC generator Choose a policy and where reports should go, and copy a valid DMARC record to add to your DNS. Open
- Disposable email checker Check whether an address belongs to a throwaway email provider, is correctly formatted, and has a domain that can actually receive email. Open
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