1. SendGrid Domain Authentication Setup

Begin by configuring domain authentication in the SendGrid administration interface:

2. DKIM Key Generation and Configuration

SendGrid provides automated DKIM key generation with configurable parameters:

3. DNS Record Publication

Publish the DKIM public key in your domain's DNS to enable signature verification:

4. DKIM Signing Activation and Testing

Enable DKIM signing and validate proper configuration:

Multiple Selector Implementation

SendGrid automatically manages multiple selectors for seamless key rotation:

Custom Domain Configuration

Enterprise environments may require custom domain configurations:

DMARC Alignment Configuration

Ensure proper DMARC alignment for comprehensive email authentication:

SPF and DKIM Coordination

Coordinate SPF and DKIM configurations for optimal deliverability:

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12 min read

Updated 2025-10-23

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