DKIM (DomainKeys Identified Mail)

DKIM (DomainKeys Identified Mail) is an advanced email authentication method that functions like a digital, invisible seal. It confirms that the message was sent by an authorized sender and that its content has not been altered in transit. The EmailLabs sending system adds a unique digital signature to the header of each outgoing message, and you publish a corresponding public key in your domain's DNS settings.

How does DKIM work?

The sending system (EmailLabs) adds a unique digital signature to the header of each outgoing message, created using a private key. The public key, which corresponds to the private key, is published by you in your domain's DNS settings. Upon receiving the message, the recipient's server retrieves the public key from the DNS and uses it to verify the signature. If the verification is successful, the server is assured that the message is authentic and has not been modified along the way.

Why is DKIM important?

• Content Integrity Guarantee: It ensures that the message content (including attachments) has not been changed since it was sent.

• Sender Credibility: It confirms that the email originates from an authorized sending infrastructure, which protects against more advanced forms of phishing.

• Key for Reputation and Deliverability: A positive DKIM verification is one of the most important signals to mailbox providers (like Gmail, Outlook, etc.) attesting to your credibility. Proper DKIM configuration is now a standard requirement for maintaining high deliverability.

DKIM Configuration in EmailLabs

As part of the sender authorization process in the EmailLabs panel, unique records (most often CNAME) are generated for you, which you need to publish in your domain's DNS settings. Our system will handle the rest – automatically signing your messages.

• Learn more about configuring DKIM in the EmailLabs panel: Sender Authorization.