Domains & DNS
SPF / DKIM / DMARC Checker & Generator
Check whether a domain has SPF, DKIM and DMARC set up — with a plain-English protection score — or build correct SPF and DMARC records from a simple form. Stop your mail landing in spam and stop spammers forging your domain.
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The SPF / DKIM / DMARC Checker & Generator does two jobs in one. Check any domain and it looks up its SPF, DMARC and (with a selector) DKIM records live, then gives you a plain-English protection score and tells you exactly what to fix. Switch to build mode and it writes correct SPF and DMARC records from a simple form — pick your mail providers, choose an enforcement policy, and copy the TXT records to add at your DNS.
This free tool by Hosting Cambodia helps Cambodian businesses stop their legitimate mail landing in spam and stop scammers forging their domain. Proper email authentication is the single biggest factor in deliverability.
Frequently asked questions
What do SPF, DKIM and DMARC actually do?
SPF lists which servers may send mail for your domain, DKIM cryptographically signs your messages, and DMARC tells receivers what to do when a message fails those checks — and sends you reports. Together they prove your mail is genuine.
Should I start DMARC at reject?
No. Start at p=none (monitor) with a reports address, confirm your real mail passes, then move to quarantine and finally reject. Jumping straight to reject can bounce legitimate email.
Why do I need a selector to check DKIM?
DKIM keys are published at selector._domainkey.yourdomain.com, and the selector is chosen by your mail provider (e.g. google, s1, k1). Without it there's no fixed place to look, so the tool checks SPF and DMARC automatically and DKIM when you supply the selector.
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