InboxGrade

Find out why your emailis landing in spam.

Send one test email. In 30 seconds, get an A-F report with the exact fixes for SPF, DKIM, DMARC, blacklists, and the Gmail/Yahoo 2024 bulk-sender rules.

  1. Copy the address below
  2. Send any email to it from the inbox you want to test
  3. Your report appears here automatically in ~30 seconds
test-7e1addbbba@tests.inboxgrade.io
Waiting for your email… (results appear here automatically)
Your report link: inboxgrade.io/r/7e1addbbba · bookmark it, your results land there even if you close this tab

No signup · Shareable report link · Expires in 24 hours if unused

Not ready to send? View a sample report →

We built this because the alternatives are paywalled, 20 years old, or both.

We run an IT company and watch small businesses lose customer email every week — misconfigured SPF, broken DKIM selectors, mail servers quietly listed on Spamhaus or UCEPROTECT. The existing tools charge for the basics and bury the fixes. So we built the one we wished existed. Free. No signup. Works for any domain, anywhere.

What you'll see

Every test checks 14 things Gmail and Yahoo now require. You get a grade and the exact fix for anything red.

A

Full auth + reputation audit

SPF, DKIM, DMARC, ARC, PTR / reverse DNS, and SPF audit (10-lookup limit). Every major blacklist (Spamhaus, Barracuda, SORBS, UCEPROTECT, SpamCop) checked in real time against your sending IP.

Required by Gmail/Yahoo 2024

Bulk-sender compliance

List-Unsubscribe + one-click (RFC 8058), DMARC alignment, MTA-STS enforcement, TLS 1.2+, BIMI brand-mark readiness, and URL/link analysis for shorteners & mismatched redirects. Miss any of these and you go straight to spam.

inboxgrade.io/r/a7f3b2…

Share, save, and monitor

Every test gets a shareable permalink and a PDF. Sign in and we save your history, chart your score over 30 days, and re-test on a schedule with alerts when it drops. DMARC Aggregate Analytics free during beta.

See all 14 checks +
  • Overall grade — A-F letter grade
  • SPF — pass/fail + record + mechanism
  • DKIM — every signature, selector, key length
  • DMARC — alignment + policy + rua/ruf
  • Spam score — SpamAssassin rules fired
  • Blacklists — every major RBL
  • TLS — version + cipher negotiated
  • PTR / Reverse DNS — forward-confirmed
  • List-Unsubscribe — headers + one-click
  • SPF audit — 10-lookup limit tracking
  • MTA-STS & TLS-RPT — policy enforcement
  • BIMI — record + VMC parse
  • ARC chain — forwarded-mail auth preservation
  • URL & link analysis — shorteners, redirects, reputation

New: DMARC Aggregate Analytics

Beta

See who's sending as you. Point your DMARC rua= at us and we parse the daily reports from Google, Microsoft, Yahoo, and more into a per-source IP dashboard. Free during beta, no credit card, no per-domain fees.

Try DMARC Analytics →

Ready to grade your inbox?

One test. Thirty seconds. A grade and the exact fix for every red check.

Run my audit →