Free Tool

DNS Validation Tool

Check your email authentication setup with comprehensive DNS validation. Verify MX, SPF, DKIM, and DMARC records to ensure optimal email deliverability.

Check Your Domain's Email Authentication Setup

What We Check

MX Records: Mail server configuration for receiving emails

SPF: Specifies which servers are authorized to send emails for your domain

DKIM: Adds a digital signature to verify email authenticity

DMARC: Defines how to handle emails that fail SPF or DKIM checks

Important-Emails Does This Automatically

When you use Important-Emails for cold email, we automatically configure SPF, DKIM, and DMARC records for all your sending domains, monitor DNS health, and alert you to any authentication issues.

Learn about SPF, DKIM & DMARC Get Started with Important-Emails