TOOLS

Email tools

Small, practical utilities tied directly to the howto.email documentation. No account required.

01

Domain Check

Inspect DMARC, SPF, DKIM, BIMI and MTA-STS, then get relevant howto.email reading for anything worth investigating.

Check a domain → 02

API Playground

Run public DNS lookups through the howto.email API, inspect records, and copy or share results.

Open playground → 03

Email Header Analyzer

Inspect authentication results, trace Received hops, and identify possible delivery delays. Headers stay in your browser.

Analyze headers → 04

Domain Intelligence Lookup

Research registration changes, public threat intelligence, DNS, certificates, and historical scan evidence before trusting a domain.

Investigate a domain →