The credit score for email sending
What's your Folderly Rating?
The free 0–100 deliverability score for any domain. Instant, explained, no signup.
Checks SPF, DKIM, DMARC, blocklists & domain hygiene in ~10 seconds.
One number. Every point explainable.
No black box, no “proprietary algorithm” hand-waving. The Rating is computed from externally verifiable signals with public weights — the full methodology is the marketing.
SPF
14 ptsRecord present, valid, within the 10-lookup limit, strict qualifier
DKIM
9 ptsKey detected via common-selector probe, ≥1024-bit
DMARC
22 ptsPolicy published and enforced — the single biggest lever
Blocklists
24 ptsSpamhaus, SURBL, SpamCop, Barracuda — Tier-1 listing caps at D
Reverse DNS
6 ptsMail hosts pass forward-confirmed rDNS
Infrastructure
25 ptsMX sanity, MTA-STS, TLS-RPT, DNSSEC, BIMI, age, parking
The grade bands
Most healthy B2B senders land in the B range. Green is earned, not default — even google.com drops points.
95–100
Elite posture
85–94
Strong sender
70–84
Fixable gaps
55–69
Caution flags
40–54
Expect filtering
<40
Failing posture
Frequently asked
What is a Folderly Rating?+
A free 0–100 score with a letter grade (A+ to F) that measures a domain's email sending posture: SPF, DKIM, DMARC, blocklist presence, reverse DNS, MTA-STS, TLS-RPT, DNSSEC, BIMI, domain age and parking status. Every deducted point cites the exact externally verifiable signal that caused it.
Does the Folderly Rating predict inbox placement?+
No — and we say this plainly. The Rating measures configuration (sending posture), not behavior. Real mailbox-provider reputation also depends on engagement and complaint rates, which are not externally observable. A high Rating with bad sending habits can still land in spam — fixing that behavior is what Folderly's platform does.
Why did my domain score differently from a competitor's?+
Open both score pages and compare the per-signal breakdown — every point difference is itemized. The most common gaps: DMARC policy (worth up to 22 points), SPF lookup-limit breaches, and blocklist listings (which cap the grade at D).
How do I improve my Folderly Rating?+
The score page lists each lost point with a fix. The highest-leverage moves for most domains: publish a DMARC record and ratchet it to p=reject, keep SPF within 10 DNS lookups with a strict qualifier, and get delisted from any blocklists. Folderly's free SPF and DMARC generators handle the records; the Folderly platform handles the rest.
Is it really free? Do I need an account?+
The headline score, grade and full per-signal breakdown are free with no signup, for any domain. When transactional delivery is available, you can optionally email yourself a score summary and link back to the live breakdown.
How accurate is the DKIM check?+
Honestly limited, and we label it that way. DKIM selectors are only discoverable by probing common names; teams using custom selectors are invisible to a probe. We report DKIM as 'detected' or 'not detected via common selectors' — never 'missing' — and score the unknown case at a neutral floor, never zero.
Your prospects already have a number.
Check your domain before your next campaign does it for you.