Named Best Deliverability Tool — Litmus Stackie Awards 2024.
Independent panel of email practitioners and Litmus staff evaluated 38 vendors on placement, transparency, and operational rigor.
EMAIL INFRASTRUCTURE FOR OPERATORS
The product behind 41,000+ campaigns that land in the primary tab.
List management software built around the messy reality of modern email — fragmented signup sources, decaying addresses, and tightening inbox rules. Unify, validate, and segment every subscriber in real time so every send lands in the primary tab and every campaign shows up as pipeline.
scorecard.list-manage9.net / acme-co
Inbox Placement Scorecard
acme.co — last 30 days
LIVE
98.7%
primary inbox placement
Sender Rep92 / 100
SPF / DKIM / DMARCPass · Pass · Pass
One-click unsubCompliant
A live slice of the public Inbox Placement Scorecard — used by 18,000+ marketers monthly.
// PRODUCT · FOUR JOBS-TO-BE-DONE
Four jobs your team performs daily — handled as discrete, observable operations.
ListManage9 isn't a feature dump. It's four configuration surfaces, each instrumented, each exportable. Every action you take produces a log line, a metric, and a downstream signal your developers and finance team can audit.
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01
Unify fragmented signup sources into one subscriber graph
Web forms, in-app upgrades, partner co-registrations, webinar RSVP exports, SMS opt-ins, and the legacy ESP import you keep meaning to retire — every source normalizes into the same subscriber record with a timestamped provenance chain. Deduplication runs on email + fingerprint, not email alone, so the same person across two devices counts as one human.
source_connectors.ymlsources: - id: web_signup_v3 type: http_post endpoint: /v3/collect status: healthy - id: partner_coredev type: s3_csv_drop status: healthy - id: legacy_mailchimp type: api_pull status: degraded · 3.2% dup rate - id: webinar_zoom type: webhook status: healthy
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02
Validate every address against decay, role, and disposable signals
Real-time detection of role addresses (info@, support@), disposable domains, typo traps (gmial.com), spam-trap hits from 11 partner networks, and long-tail decay patterns (no opens in 180 days at a sender they used to engage with). Each subscriber receives a 0–100 health score that travels with them and decays as inbox providers revise their engagement signals.
validation_report — march cohort- 186,401deliverable · score 80+
- 14,028role or disposable · auto-routed
- 9,114typo / suggestion offered
- 4,859long-tail decay · suppression pool
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03
Segment on behavior, identity, and lifecycle stage — not just lists
A segment is a saved query, not a frozen list. Build on first-party behavior (last open, last click, feature used, plan tier), identity (role, department, inferred company size), and lifecycle stage (activation in last 14 days, at-risk, dormant). Every segment recomputes in under 90 seconds and ships a delta event your warehouse can subscribe to.
segment.dormant_enterprisematch: all - event: account.plan value: enterprise - event: email.opened window: 180d operator: not_exists - profile: health_score gte: 60 approximate_size: 3,841 last_run_ms: 412
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04
Send through infrastructure aligned with Gmail, Yahoo, and Microsoft
Dedicated sending IPs co-located with mailbox providers, automatic List-Unsubscribe-Post and one-click unsubscribe headers, BIMI-ready DKIM, and authenticated return-path on every domain. ListManage9 was the only ESP fully aligned with Gmail and Yahoo's February 2024 bulk-sender requirements on launch day — and we publish the alignment checklist as a public artifact.
alignment_status.json{ "one_click_unsub": "compliant", "spf": "pass · acme.co", "dkim": "pass · 2048-bit", "dmarc": "p=reject · pct=100", "spam_rate_threshold": "0.08% — under 0.3% cap", "bimi": "pending VMC" }
decay_cost.monthly
BEFORE / AFTER
- Bounce & block spend
- Recaptured send capacity
// ECONOMICS
Your list is bleeding revenue. We can show you, in dollars, how much.
Most teams know their list is decaying. Few can put a number on it. ListManage9 attributes every dropped send, role-address misfire, and spam-trap hit back to the signup source that produced the address — and re-routes that source before it bleeds again.
64%
average reduction in list-decay cost in the first 90 days across 3,200+ customers.
- Real-time bounce, role, and disposable-address detection at signup and at send.
- Spam-trap network of 11 data partners — checked on every import, not once a quarter.
- Per-source decay attribution surfaced in the dashboard so growth knows where to plug the leak.
- Suppression groups that respect suppression, don't silently re-include on re-import.
// DEVELOPERS
A published Sender Reputation API. No other ESP ships this.
Your engineering team should be able to read sender reputation the same way they read error rates — a number, a trend, a webhook. ListManage9 exposes a REST endpoint and a streaming channel that return domain-level reputation, IP-level reputation, and forward-looking inbox placement predictions, all of which can be wired straight into Datadog, PagerDuty, or your BI tool.
- GET /v1/reputation/{domain} — current score, 30-day trend, contributing signals.
- POST /v1/webhooks — fire on score drop > 5 points, spam-rate crossing 0.1%, or DMARC failure.
- WS /v1/stream — per-send placement prediction, useful for transactional gating.
- OpenAPI 3.1 spec — versioned, with SDKs for TypeScript, Python, Go, and Ruby.
~ / curl list-manage9.net/v1/reputation/acme.co
$ curl -s https://api.list-manage9.net/v1/reputation/acme.co \ -H "Authorization: Bearer $LM9_KEY" HTTP/2 200 OK content-type: application/json cache-control: max-age=30 { "domain": "acme.co", "score": 92, "tier": "excellent", "trend_30d": [89, 90, 91, 90, 92, 92, 92], "placement_pct": 98.7, "signals": { "spf": "pass", "dkim": "pass", "dmarc": "pass · p=reject", "bimi": "pending", "unsub": "one_click", "spam_rate": 0.08 }, "recommendations": [ "rotate DKIM key before Q3 (age 274d)" ] }
IN PRODUCTION AT
- Calendly
- Notion
- Replo
- Superhuman waitlist ops
- Loom
- Linear
98.7% average inbox placement — audited by Validity, Q3 2024.
Across 41,000+ managed campaigns sent through ListManage9 infrastructure, with no manual IP warming or workarounds applied.
G2 Spring 2025 Email Marketing Grid · Leader.
4.8 / 5 average rating across 612 verified reviews. Highest score in the segment for "quality of support" and "ease of doing business with."
SOC 2 Type II continuously since 2019. GDPR & CCPA aligned.
Audit reports available under NDA. Only ESP fully aligned with Gmail and Yahoo's 2024 one-click unsubscribe and bulk-sender rules on launch day.
SOC 2Type II · since 2019
GDPRaligned
CCPAaligned
VALIDITYQ3 2024 audited
LITMUS2024 Stackie winner
G2Spring 2025 Leader
// NEXT STEP · 20 MINUTES
Book a free deliverability audit.
Book a free deliverability audit.
We'll send back a Scorecard like the one above.
Pick a 20-minute window with a solutions engineer. Bring one sending domain and one recent campaign. You'll leave with a private Inbox Placement Scorecard, a sender-reputation baseline, and a written list of the three changes that move the needle most for your program.
- Live inbox placement read — across Gmail, Microsoft, and Yahoo, against your real list.
- Sender reputation baseline — current score, 30-day trend, and the signals pulling it down.
- Three prioritized fixes — the changes that will move the needle in the next 30 days, ranked by effort vs. impact.
No sales pitch. No slide deck. A solutions engineer and a live terminal. ListManage9, Inc. · 548 Market Street, Suite 32117, San Francisco, CA 94104.