SPF, DKIM, DMARC Checker & Generator
SPF, DKIM and DMARC Checker and Generator
Email authentication decides whether your messages reach the inbox or the spam folder. Check the SPF, DKIM and DMARC records published for any domain, see them explained in plain language, and use the generators to build correct records. Correct records protect your domain from spoofing and improve deliverability.
SPF Record Checker & Generator
🔍 SPF Record Checker
🛠️ SPF Record Generator
🔍 DKIM Record Checker
Full DKIM DNS Record: —🛠️ DKIM Record Generator
DMARC Record Checker & Generator
🔍 DMARC Record Checker
🛠️ DMARC Record Generator
How to use it
- Choose the SPF, DKIM or DMARC section.
- Enter your domain (and the selector for DKIM) and press Check.
- Use the generator to build a record, then publish it as a TXT record in your DNS.
Frequently asked questions
What is the SPF 10 lookup limit?
An SPF record may trigger at most 10 DNS lookups. Exceeding it makes SPF fail with a permerror, so include only the senders you really use.
How do I find my DKIM selector?
It appears in the DKIM-Signature header of a sent message as s=selector. Common selectors include selector1, selector2 and google.
Which DMARC policy should I start with?
Start with p=none and a reporting address, review the reports, then move to quarantine and finally reject once legitimate senders all pass.