Enter your domain and abr.cloud looks for your DKIM signing keys — the cryptographic signature that proves your mail wasn't tampered with — and tells you, in plain language, whether it's present and strong enough.
One quick verification, no account. We store nothing unless you start monitoring.
DKIM (DomainKeys Identified Mail) adds a digital signature to every message you send, published as a public key in DNS. Receivers verify it to confirm the mail really came from you and wasn't altered in transit. Together with SPF it's what DMARC relies on — without DKIM, your DMARC enforcement is standing on one leg.
Yes — free with a quick CAPTCHA, no account. It reads only public DNS.
DKIM lives under a per-provider selector; we probe common ones, but if yours is custom, check your provider's DKIM settings for the selector name.
Yes — DMARC needs SPF or DKIM aligned, and DKIM survives forwarding where SPF often breaks. Run both.
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