FREE TOOL
Generate DKIM keys and DNS records for email authentication. Create cryptographic signatures to secure your email delivery.
Select your email provider for specific instructions
Unique identifier for this DKIM key (letters, numbers, hyphens only)
Validate existing DKIM records and signatures.
Create SPF records for email sender authorization.
Complete domain authentication analysis.
Validate SPF records and sender policies.
Test email content for spam triggers.
Calculate optimal mailbox setup for campaigns.
DKIM key generation creates the cryptographic foundation for email authentication. Proper key management and DNS configuration are essential for email security.
Use 2048-bit keys minimum
1024-bit keys are deprecated and no longer secure.
Rotate keys regularly
Replace keys every 6-12 months for optimal security.
Test before deployment
Use testing mode to validate configuration first.
Use descriptive selectors
Choose selectors that identify the service or purpose.
Monitor DNS propagation
Allow time for DNS changes to propagate globally.
Handle long records properly
Split 2048+ bit keys if your DNS provider requires it.
A DKIM generator is a tool that creates the public and private key pairs needed for DomainKeys Identified Mail (DKIM) authentication. It also generates the corresponding DNS TXT record that you need to publish.
We recommend using 2048-bit keys for a good balance of security and compatibility. 1024-bit keys are considered weak and should be avoided if possible. 4096-bit keys offer higher security but may not be supported by all DNS providers due to record length limits.
The private key must be configured on your mail server or email service provider (keep it secret!). The public key (TXT record) must be added to your domain's DNS settings so receiving servers can verify your emails.
A selector is a unique identifier that allows you to have multiple DKIM keys for the same domain (e.g., for different departments or services). Common selectors include 'default', 'google', or 'mail'.
InboxKit automatically generates and manages DKIM keys for maximum email security
