Why does DNS checking use a server function?
Browsers cannot read TXT DNS records directly. The API route checks DNS server-side on Netlify's free infrastructure.
Free SPF, DKIM and DMARC checker
Free SPF DKIM DMARC checker to inspect email DNS records and deliverability issues.
0 EUR No account Netlify Function
How to use free spf, dkim and dmarc checker
Enter your information, generate the result, then copy it into your project. The core tool stays free and usable without creating an account.
Need a custom tool?
I can build a calculator, generator or checker tailored to your SEO acquisition.
Contact meFAQ
Do I need a DKIM selector?
Yes for DKIM. The selector depends on the email provider: google, selector1, default, mail, etc.