DNS Email Auth Check

Grade a domain's SPF, DKIM, and DMARC setup with plain dig. No signup required.

Prerequisites

• dig (bind-utils / dnsutils — preinstalled on macOS and most Linux)

Trigger

• "Check SPF/DKIM/DMARC for example.com"
• "Is my domain protected against spoofing?"
• "Why does my mail land in spam?"
• "Audit email auth on example.com"

Workflow

Set DOMAIN to the bare domain. All queries are read-only DNS lookups.