Tools

Overview of tools for checking and designing SPF, DKIM and DMARC, including supporting utilities.

SPF

Check, design and edit SPF records

Check your domain's SPF record, find issues, and get recommendations.

Build an SPF record step by step with guidance and validation.

Paste or edit an SPF value and validate syntax and impact.

Key analysis, design and DKIM record editor

Search selectors, verify the public key and get configuration advice.

Generate a DKIM TXT value from the public key and options (k, t, p).

Enter or edit a DKIM record and validate key tags (v, k, p).

Policy check, design and DMARC editor

Evaluate DMARC policy, alignment and reporting, and get clear recommendations.

Design DMARC policies step by step, including reporting and enforcement.

Edit a DMARC value and validate syntax and key tags (p, sp, pct, rua, ruf).

Comprehensive check of SPF, DKIM, DMARC and HTTPS in one place.

Quick queries for A, MX, TXT, NS and other record types.

Check redirects, certificate and security headers.

Recommended settings for domains that never send email.