Free DKIM Checker

DKIM has no self-discovery mechanism in DNS, so most checkers guess blindly. This one also detects your mail provider via MX records first, to guess right more often — plus SPF, DMARC, and blacklist status.

Your domain — the website address, not an email address (gmail.com, outlook.com, etc. are already set up correctly)

We only read public DNS — never your inbox. Nothing is stored unless you explicitly ask us to email you a copy.

TipSending marketing or transactional email from a subdomain, like mail.yourdomain.com or news.yourdomain.com? Check that separately — it needs its own SPF, DKIM, and DMARC, and a clean result above doesn't cover it.

Know your exact DKIM selector already? Monitoring lets you record it once for an exact daily check, no guessing involved.