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Protect your organization’s domain from email-based threats with expert DomainKeys Identified Mail (DKIM) configuration. Authenticated emails not only improve deliverability but also protect your brand’s reputation.
Take control with Sendmarc’s simple DKIM setup and email security solutions.
Get started now:
Sign up or book a demo to see how Sendmarc simplifies DKIM configuration and strengthens your business’s email defenses.
DKIM email signatures help ensure message integrity by detecting unauthorized modifications. This assists in protecting your organization from Man-in-the-Middle (MitM) attacks.
Signed emails strengthen your business’s domain reputation with email servers. This improves inbox placement and reduces the chance of messages being marked as Spam.
DKIM proves to recipients that emails from your company’s domain are legitimate. This builds trust, enhances brand credibility, and helps prevent impersonation.
Strong email authentication is often required for regulatory compliance. Proper DKIM configuration supports multiple requirements.
Want to protect your brand and improve deliverability?
Sign up or book a demo with Sendmarc today.
| Host | Type | Value |
|---|---|---|
| selector._domainkey.yourdomain.com | TXT | v=DKIM1; k=rsa; p=[YourPublicKeyHere] |
Here is a CNAME record example:
| Host | Type | Value |
|---|---|---|
| selector._domainkey.yourdomain.com. | CNAME | selector.domainkey.providerdomain.com. |
Regular key rotation lowers the risk of key compromise and strengthens long-term security.
How to rotate DKIM keys:
Tip: Some email security providers offer automated DKIM key rotation to simplify the process.
While DKIM strengthens email security, implementation can come with technical challenges. Here is how to address the most common issues.
DKIM records can take time to propagate across the DNS, which might cause temporary authentication issues.
Make DNS changes during off-peak hours. Use DKIM checking tools to confirm propagation before sending authenticated emails.
Outdated keys and weak DKIM key sizes can expose your domain to security risks.
Use keys that are at least 2 048 bits in length and rotate keys regularly to reduce the risk of compromise.
An improper DKIM record format can result in failed email authentication.
Validate your records using online tools to ensure correct setup.
Need expert help?
Book a demo or sign up to try out Sendmarc’s DKIM configuration service.
DKIM configuration is the process of setting up DomainKeys Identified Mail (DKIM) authentication for your domain. This involves creating a DKIM record in your DNS and enabling email signing to help validate that your messages are authentic.
To implement DKIM, you need to generate a public/private key pair, publish the public key in the DNS record, and enable DKIM signing. It is important to follow the specific setup instructions provided to ensure proper authentication.
To configure DKIM, you must access your domain’s DNS settings, create a DKIM record (typically TXT or sometimes CNAME), and confirm that you’re signing outgoing emails using the correct private key. This ensures messages sent from your domain can be verified by receiving servers.
Yes, setting up DKIM is essential. DKIM configuration helps protect your domain from Man-in-the-Middle (MitM) attacks, improves your email deliverability, and supports compliance with multiple industry standards.
You can technically send emails without DKIM, but doing so increases the risk of your messages being flagged as Spam or rejected altogether. Without DKIM, your domain is also more vulnerable to cyberattacks.