DKIM Record
Generator
Generate secure DKIM key pairs and DNS records for your domain in seconds. Authenticate your outgoing emails and protect your sender reputation with cryptographic signing.
DNS TXT Record
How to Configure DKIM
- 1 Copy the Private Key and configure it on your mail server (e.g., in Postfix, Sendmail, or your email platform)
- 2 Log in to your DNS provider and navigate to DNS settings
- 3 Add a new TXT record with the name shown above (e.g.,
selector._domainkey) - 4 Paste the DNS record value as the TXT record content
- 5 Wait for DNS propagation (up to 48 hours) and verify with our DKIM checker
What is DKIM and Why Does It Matter?
Understanding DKIM (DomainKeys Identified Mail)
DKIM is an email authentication protocol that uses cryptographic signatures to verify that an email message was sent by an authorized mail server and hasn't been tampered with during transit. When you send an email, your mail server signs the message with a private key. The recipient's mail server then uses the public key (published in your DNS) to verify the signature.
Benefits of Implementing DKIM
Improved Email Deliverability
Major email providers like Gmail, Microsoft, and Yahoo prioritize DKIM-signed emails, leading to better inbox placement rates.
Protection Against Email Spoofing
DKIM prevents attackers from forging emails that appear to come from your domain, protecting your brand and recipients.
Message Integrity Verification
Recipients can verify that the email content hasn't been modified during transit, ensuring message authenticity.
DMARC Compliance
DKIM is a required component for DMARC implementation, which provides comprehensive email authentication and reporting.
DKIM Key Length Comparison
Legacy key size. Use only if your DNS provider has character limits. Provides basic security but may become deprecated.
Industry standard. Offers excellent security and is supported by all major email providers and DNS services.
Maximum security. May require splitting the DNS record into multiple parts. Use for high-security requirements.
Running Your Own Email Infrastructure
Guides for choosing software and servers when you send from infrastructure you control.
Self-Hosted Email Marketing Software
Eleven self-hosted platforms compared by license, price, sending setup and fit.
VPS for Email Marketing
Port 25 policies, reverse DNS and extra IPs across 14 VPS providers.
Open Source Email Marketing Software
listmonk, Mautic, Keila, phpList and more, with license and last release.
Bulk Email Software
SaaS, self-hosted and desktop senders priced at 400,000 emails a month.
Mailchimp Alternatives
Real prices at 10,000 and 100,000 contacts, including self-hosted options.
Need Enterprise Email Infrastructure?
Octeth provides self-hosted email marketing software with built-in DKIM signing. Own your infrastructure and maintain full control over your email authentication.