Email deliverability,
demystified.
Free tools that check your email-auth setup, build the records you need, and explain the result in plain English. No signup, no crawl, no mail sent.
Checkers
Audit a published record and read the result in plain English.
- DMARC
DMARC audit
Paste any domain. Plain-English DMARC record audit, parsed alignment + policy + reporting endpoints. 3 seconds, no signup.
Open the tool - SPF
SPF tester
Walks every include and counts lookups against the RFC 7208 10-cap.
Open the tool - DKIM
DKIM verifier
Auto-scans the 16 most common ESP selectors. No selector required.
Open the tool
Generators
Answer a few questions and get a paste-ready record.
Inspectors
Paste something and we parse the details for you.
- HEADER
Email header analyzer
Paste raw email headers. We parse the auth chain in plain English.
Open the tool - BIMI
BIMI validator
Verify the BIMI record + SVG logo + VMC chain.
Open the tool - MTA-STS
MTA-STS validator
Read the policy file, check the DNS pointer, name the drift.
Open the tool - RUA
DMARC report uploader
Paste a raw DMARC XML report, get plain English back plus a p=reject preview.
Open the tool - HEADER
Delivery diagnosis
Bounced or in spam? Paste the headers, get the cause in plain English.
Open the tool - MANDATE
Bulk sender compliance
Paste a real message's headers, see if it meets the Google and Yahoo rules.
Open the tool
Want one of the coming-soon tools sooner? .
Monitor it, don’t just check it.
Free.
The tools give you a snapshot. Add one domain free and we watch it every day, with plain-English reports and one-click fixes when something breaks.