By the Folderly deliverability team · For agencies, SDR teams, multi-domain senders

Your cold-email estate has a verdict.
You just can't see it yet.

Folderly Lens shows you the view Spamhaus, Gmail, and Microsoft already have of your sending estate. Same-day registration bursts, shared M365 pools sold as "isolated infra", DMARC published but not enforced, mailbox density 30× the safe line. Per-domain KILL / REHAB / KEEP register with the reason for every call. Zero access to your sending platform. Every finding reproducible.

Preorder · $149/mo Scan an estate ↓
14-day refund · free first audit · support@folderly.com
Same engine Folderly's deliverability team runs on real clients
1 client audit live · TPF: 90 domains, 17 SURBL-listed
MIT-licensed verdict precedence · every finding reproducible
V
A Folderly product, built and operated by Vlad Podolyako ↗ — Folderly co-founder. Folderly Lens runs the same external audit engine Folderly's deliverability team uses on real client estates — including the 90-domain audit referenced below. Free first audit. Refund any time in 14 days, replied personally.
Free preview · paste your sending domains

Paste an estate.
Watch it get a verdict.

Paste the domains you send cold email from (one per line). We simulate the external scan the real engine runs — SPF / DMARC / DNSBL / RDAP age / mailbox density — and return the same KILL / REHAB / KEEP call your prospects' mailbox providers are already making silently.

⌬ External estate scan · v0.1 preview
Domains never leave your browser in this preview — the verdict logic mirrors the real build_register.py precedence. The live product runs the actual DNS/RDAP/DNSBL collector.
Paste domains above (or pick a sample) and run the scan to see the per-domain verdict.
◆ The real product runs the actual external collector — recursive SPF lookup count, 16-selector DKIM probe, DMARC enforcement check, RDAP/WHOIS registration-burst detection, and 8 public DNSBLs against MX / web / SPF-authorised IPs. It produced the 90-domain ThePerfectFranchise audit (17 SURBL-listed, 50 on shared M365 sold as "isolated"). Re-run it after remediation and it objectively measures whether the fixes worked.
Send us the real list — first full estate audit is free. Keep the KILL/REHAB/KEEP register whether you remediate with us or not.
Start monitoring · $149/mo →
Why bother

Three numbers that decide it.

90
Domains audited on one real client estate
ThePerfectFranchise: 90 domains / 5,120 mailboxes, all registered the same day by one registrant. 17 already SURBL-listed. 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, a CSV, or your sequencer export (Instantly, Smartlead, Apollo). We extract a clean domain set — no platform access, no credentials.
⌬ STEP 02
External collector runs
SPF (+ recursive lookup count), 16-selector DKIM probe, DMARC enforcement, MX/NS/A, RDAP/WHOIS registration-burst, TLS, and 8 DNSBLs against MX / web / SPF IPs.
⌬ STEP 03
Per-domain 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. The first one is free.
Cheaper than 1 hour of a deliverability consultant
  • Full external collector run
  • Per-domain 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 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've already run this on a 90-domain client estate end to end. Delivery SLA: 24h.

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.

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.