SPF / DKIM / DMARC Checker
Validate TXT records and highlight common misconfigurations.
What to look for
- SPF: a single record, terminal policy (~all or -all), DNS lookups ≲ 10.
- DKIM: correct selector and a published public key (p=...).
- DMARC: p=quarantine/reject for enforcement, rua= for reports, alignment (adkim/aspf).
This tool uses a server-side service for processing; uploaded files or requests are not kept for long-term storage.
About
Email authentication depends on correct DNS records. This checker helps you validate SPF, DKIM and DMARC so you can improve deliverability and reduce spoofing risk. It’s useful when emails go to spam, authentication fails, or you’re setting up a new sending domain.
The tool reads the relevant DNS records and presents them in a more readable way. You can quickly see whether records exist, whether syntax looks valid, and whether policies are strict enough for your needs.
Remember that providers have different interpretations and additional heuristics. Use this tool as a fast diagnostic step, then test with your mail provider and examine sending logs for final confirmation.
How it works
- 1Open SPF / DKIM / DMARC Checker and choose your file or enter the required input.
- 2Check the settings and start the process.
- 3The tool creates the result with temporary server-side processing.
- 4Download the output or copy the result when it is ready.