Free email authentication tools built to feel like the product
Check SPF, DKIM, DMARC, and related DNS posture instantly. Every tool keeps the same sharp visual system as the main Inbox Insignia platform without burying the technical details.
Immediate answers
Run checks in seconds with no account gate.
Readable output
DNS records and recommendations stay dense but legible.
Upgrade path
Move from one-off checks into continuous monitoring when ready.
Why Check Your Email Authentication?
Google & Yahoo Requirements
Since 2024, Google and Yahoo require DMARC, SPF, and DKIM for bulk senders. Non-compliant domains risk having emails rejected or sent to spam.
Protect Your Brand
Properly configured email authentication prevents bad actors from spoofing your domain and sending phishing emails to your customers and partners.
Improve Deliverability
Correctly set up SPF, DKIM, and DMARC records signal trust to inbox providers, improving your email delivery rates and reducing spam folder placement.
Need Continuous Monitoring?
These free tools give you a point-in-time snapshot. For continuous scanning, drift detection, compliance scoring, and instant alerts when something changes, sign up for Inbox Insignia.