What is DKIM?
DKIM stands for DomainKeys Identified Mail. It is an email authentication method designed to detect forged sender addresses in emails. DKIM allows an organization to take responsibility for a message that is in transit by signing it with a
cryptographic key. This signature can be verified by the recipient to ensure that the email has not been altered in transit.
How Does DKIM Work?
When you send an email, DKIM adds a
digital signature to the email header. This signature is generated using a private key that is stored on your email server. The recipient's email server can then use the corresponding public key, which is published in your domain's
DNS records, to verify the authenticity of the signature. If the signature is valid, it means that the email has not been tampered with and is indeed from the claimed sender.
How to Verify DKIM?
Verifying DKIM involves checking the email headers to see if a valid DKIM signature is present. Here are the steps to verify DKIM:
Open the email and view its full headers.
Look for the DKIM-Signature header field.
Use a
DKIM validator tool to check the signature against the public key published in the DNS records.
If the signature matches, the DKIM is verified.
Common Issues with DKIM Verification
Several issues can cause DKIM verification to fail: Regularly checking and updating your
DKIM settings can help prevent these issues.
DKIM and Other Email Authentication Methods
While DKIM is powerful, it is often used in conjunction with other
email authentication methods like
SPF (Sender Policy Framework) and
DMARC (Domain-based Message Authentication, Reporting, and Conformance). SPF specifies which mail servers are allowed to send email on behalf of your domain, and DMARC uses both SPF and DKIM to provide a unified way to validate email messages and report discrepancies.
Conclusion
Verifying DKIM is an essential step in
securing your email marketing campaigns. It helps in building trust, improving deliverability, and protecting your domain from malicious activities. By understanding how DKIM works and regularly verifying it, you can ensure that your email marketing efforts are both effective and secure.