Folderly Lens

Paste domains or IPs. See what to retire, fix, or keep.

Folderly Lens checks public DNS, authentication, MX, IP rDNS, and blacklist signals, then returns a KILL / REHAB / KEEP verdict with a copyable fix plan. No signup, no mailbox access, no test sends.

Scan my estate Try sample estate
Used on a 90-domain estate audit · 17 SURBL-listed domains found · every finding reproducible
90 domains audited on one real client estate
0 credentials, inboxes, or sequencer connections required
24h turnaround for the first full estate register
External estate scan · live DNS + IP RBLs
Paste domains or IPs. Get the fix plan.
No signup
Up to 10 domains or IPs per scan. Domains get live SPF, DMARC, MX, and RBL checks. IPs get PTR/rDNS, forward-confirmed rDNS, and public IP blacklist probes. The full collector adds RDAP/WHOIS, 16-selector DKIM probing, SURBL, direct resolver checks, and weekly drift monitoring. See scoring methodology
Paste manually or import a sender export for review before scanning.
Paste domains or IPs above, or pick a sample to see the verdict and fix plan.
This is the real external collector: public DNS checks, IP rDNS checks, RBL lookups, deterministic verdict precedence, and a shareable action cockpit. Re-run after remediation to prove whether the estate actually improved.
Need the full register? First full estate audit is free for the first 5 estates each week.
Request audit Monitor · $149/mo
DNS + IPAuthentication, MX, rDNS, and public blacklist checks in one free scan.
K/R/KKILL, REHAB, KEEP verdicts your team can act on immediately.
$149Weekly estate monitoring after the first full audit.
Focused checks

Start with the signal you suspect.

Each checker feeds the same live scanner. Use one when the problem smells like DNS, authentication, IP reputation, blacklist exposure, or a reseller estate that needs a broader audit.

SPF checkerFind missing SPF, loose qualifiers, and sender authorization gaps before mailbox providers distrust the domain.Check SPF → DMARC checkerSee whether a sending domain has an enforced policy or is still sitting on weak monitoring-only posture.Check DMARC → DKIM checkerValidate sender authentication context before missing signatures or stale selectors weaken trust.Check DKIM → MX record checkerConfirm each sender has a credible receiving path before it looks disposable or unfinished.Check MX → Reverse DNS checkerCheck PTR and forward-confirmed rDNS on sending IPs before infrastructure hygiene becomes the hidden risk.Check rDNS → Domain reputation checkerRead public authentication, routing, and blacklist signals in one domain-risk view.Check reputation → Domain blacklist checkerCatch DNSBL exposure that can poison the whole campaign, then decide whether to retire or rebuild.Check blacklists → IP blacklist checkerCheck sending IPs for public RBL hits, missing PTR, and rDNS mismatch before infrastructure risk spreads.Check IPs → Blacklist removal planSeparate assets worth delisting from senders that should be retired or rebuilt first.Build removal plan → DMARC policy checkerSee whether p=none, quarantine, or reject is published before authentication risk blocks scaling.Check policy → Cold-email domain auditScan a whole outbound estate and get the KILL / REHAB / KEEP plan for each sending domain.Audit estate →
Why bother

Three numbers that decide it.

90
Domains and IPs audited on one real client estate
ThePerfectFranchise: 90 domains / 5,120 mailboxes, all registered the same day by one registrant. 17 already SURBL-listed. Sending IP checks now catch the infrastructure side too. Verdict: CRITICAL, not salvageable. The engine that found that is the product.
$0
Access to your sending platform required
No API keys, no inbox connection, no test sends. Every signal is the public view a mailbox provider or blacklist operator already has. That's the credibility anchor — the verdict holds without insider access.
100%
Reproducible — re-run measures remediation
The collector is deterministic and resumable. Run it before fixes, run it after, diff the register. "Did remediation work?" stops being an opinion. That loop is what the $149/mo monitors.
How it works

Four scripts. One verdict.

⌬ STEP 01
Send the list
A domain list, sending IPs, a CSV, or your sequencer export (Instantly, Smartlead, Apollo). We extract a clean asset set — no platform access, no credentials.
⌬ STEP 02
External collector runs
SPF (+ recursive lookup count), 16-selector DKIM probe, DMARC enforcement, MX/NS/A, IP PTR/rDNS, RDAP/WHOIS registration-burst, TLS, and DNSBL/RBL checks against domain and sending-IP signals.
⌬ STEP 03
Per-asset verdict
Transparent precedence → KILL / KILL→REPLACE / REHAB / KEEP with the exact driver list and a risk band. CSV your team can execute + an interactive HTML report.
Pricing

Audit once. Monitor forever.

Audit · one-time
$149
One estate, up to 50 domains. First 5 audits each week are free.
Cheaper than 1 hour of a deliverability consultant
  • Full external collector run
  • Per-domain/IP KILL/REHAB/KEEP register (CSV)
  • Interactive HTML report
  • Keep it whether you remediate or not
Get your free estate audit →
Monitor · most popular
$149/month
Weekly external re-scan of the whole estate.
Pays for itself if it saves 1 reseller invoice
  • Everything in Audit, weekly
  • Alerts on new DNSBL hits
  • SPF / DMARC drift detection
  • Remediation tracking (before/after diff)
  • 14-day refund
Preorder · $149/mo →
Agency
$499/month
Unlimited client estates under one roof.
Replaces ~8 hours/mo of manual auditing per client
  • Unlimited domains across clients
  • White-label PDF + shareable register
  • API access to the collector
  • Priority audit turnaround (≤12h)
Preorder · $499/mo →
Feature
Audit
Monitor
Agency
Single-estate scan
✓
✓
✓
Per-domain/IP register (CSV)
✓
✓
✓
Interactive HTML report
✓
✓
✓
Weekly re-scan
—
✓
✓
Change-only alerts
—
✓
✓
Remediation tracking (before/after)
—
✓
✓
Multi-client estates
—
—
✓
White-label PDF
—
—
✓
API access to the collector
—
—
✓
Priority audit turnaround (≤12h)
—
—
✓
Enterprise
Running 100+ sending domains? Talk to Folderly enterprise.
Talk to enterprise →
Who's in
FAQ

The honest answers.

How is this different from Folderly Solo (#10)?

Both are Folderly products. Folderly Solo scores one cold email for a solo founder; Folderly Lens audits a whole domain estate for agencies. Different buyer, different problem. If you send from 1 domain, use Folderly Solo. If you bought 15+ from a reseller, you're here.

Do you need access to my sending platform?

No. That's the entire point. Everything Folderly Lens reports comes from public DNS, RDAP/WHOIS, HTTP, and public DNSBLs — the same view Gmail and Spamhaus already have. No API keys, no inbox connection, no test sends.

Is the free audit real or a teaser?

Real. The free audit IS Folderly Lens running on your estate. You get the full per-domain register and HTML report and keep it whether or not you pay for monitoring. We cap it at the first 5 estate audits each week so every one gets a careful human review — delivery SLA 24h. We've already run this on a 90-domain client estate end to end.

What's the refund policy?

14-day full refund on Monitor/Agency. Reply to support@folderly.com (Folderly support) or vlad@belkins.io (founder). Cancel any time via Stripe.

"Infra.email / Zapmail / Maildoso told me my domains are isolated."

That's exactly the claim Folderly Lens tests. On the ThePerfectFranchise estate, "Infra.email" resolved to shared Microsoft 365 outbound — no IP isolation, shared fate with every other tenant. A provider label in a sheet is not sending infra. We verify it via MX + SPF includes, and you can now paste known sending IPs to check PTR/rDNS and public RBL exposure too.

Your estate already has a verdict.
You just haven't read it yet.

$149/mo to monitor an estate. First audit free. Or join the early-access list and we'll send the redacted 90-domain audit + the risk-scoring rules.

Part of Folderly

Deliverability software, audit-grade estate visibility.

Folderly Lens extends the Folderly product family for teams running multi-domain outbound. Use the scanner for public-state domain and IP risk, then move into Folderly when you need managed deliverability, inbox placement support, and sender reputation operations.

Built and operated by Vlad Podolyako with the Folderly deliverability team.

Visit Folderly.com