DKIM Record Checker
Verify that your domain's DomainKeys Identified Mail (DKIM) TXT record is correctly published in DNS, your selector matches, and your public key is cryptographically valid.
What is DKIM and why is it essential?
DomainKeys Identified Mail (DKIM) is an open email authentication standard that attaches a digital cryptographic signature to emails. Recipient servers use the sender's public key published in DNS to confirm the message was genuinely sent by the domain owner and was not altered in transit.
Guarantees Email Authenticity
DKIM prevents attackers from spoofing your domain name, ensuring that only your authorized servers can sign outbound emails.
Required by Gmail & Yahoo
Since February 2024, Google and Yahoo enforce strict DKIM and SPF authentication for all bulk senders (>5,000 emails/day).
2048-Bit Recommended
While 1024-bit RSA keys are still supported by most servers, modern security guidelines strongly recommend 2048-bit keys to withstand factoring attacks.
Automate your email deliverability
Mailofly provides automated DKIM rotation, dedicated IP pools, and zero-downtime multi-provider failover. Send your first 10,000 emails free.