✦ New — the AI Reputation Trainer now paces your volume per-ISP, automatically. See how →
Email deliverability platform

Land in the inbox.
Not in spam.

ZKemail warms your domains, monitors every ISP, fixes your DNS, and gets your email to the inbox — automatically. The deliverability infrastructure behind high-volume senders.

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✓No credit card required✓Self-hosted or cloud✓Live in under 10 minutes
▲
+34% inboxlast 30 days
✦
0 blacklists14 ISPs clean
app.zkemail.io / deliverability

Inbox placement

0%
Inbox2.1% spam · 0% missing
▲ 6.4 pts this week

Per-ISP reputation

Gmail97
Outlook94
Yahoo91
iCloud96

Warmup volume

Day 1 · 200/dayDay 42 · 50k/day

Live activity

DKIM verified · pkexpo.com
Seed test → 98% inbox · Gmail
AI paced volume +12% · Yahoo
SPF auto-fixed · 3 domains
TRUSTED BY SENDERS DELIVERING 10M+ EMAILS / MONTH
CortexpkexpoAtkinson CoBGV RatiSuccor LeadsWebprosaAlltradedepot CortexpkexpoAtkinson CoBGV RatiSuccor LeadsWebprosaAlltradedepot
0%
Avg inbox placement
0
ISPs monitored live
0M+
Emails warmed
0%
Platform uptime
The problem

Your cold domains are landing in spam

Deliverability is invisible until a campaign tanks. ZKemail makes it measurable, automated, and fixable.

Before Flying blind

  • Cold IPs and domains burn before they ever warm up
  • No idea whether you hit inbox, spam, or Promotions
  • PMTA logs, DNS, blacklists, FBLs scattered across 8 tools
  • One bad DKIM record quietly kills a whole sending domain

After Full control

  • Adaptive, per-ISP warmup that never burns a domain
  • Real-time inbox placement across every major mailbox
  • Reputation, bounces, DNS and intel in one console
  • SPF / DKIM / DMARC diffed and fixed in one click

Replace your seed-test tool, blacklist monitor, DNS console and spreadsheet with one platform.

Core platform

Everything deliverability needs, in one place

Six engines working together so your mail reaches people — not filters.

◈

Intelligent warmup

Ramp volume the way ISPs trust. Adaptive per-ISP growth curves with circuit breakers that pause before reputation ever slips.

Proof: reputation-aware send loop
◎

Inbox placement

Know exactly where you land. Live seed tests across Gmail, Outlook, Yahoo and iCloud — inbox vs spam vs tabs, in real time.

Proof: per-ISP placement, live
⬢

DNS authentication

SPF, DKIM, DMARC and BIMI, fixed in one click — diffed and pushed straight to your registrar.

Proof: Namecheap + NameSilo
◣

PMTA intelligence

Your PowerMTA fleet, decoded. Reputation, bounces, deferrals and DSN ingested over SSH.

Proof: 11-server fleet
✦

AI reputation trainer

Deliverability on autopilot. Per-ISP adaptive volume and anomaly prediction pace your sending.

Proof: bandit-learned pacing
◆

Competitive intel

See what competitors send — subject lines, cadence and deliverability — from a seed inbox.

Proof: seed-inbox attribution
How it works

From cold domain to the inbox in four steps

1

Connect your senders

Point your SMTP, PowerMTA or domains at ZKemail. No agent, no rewrite.

‹ 2 minutes
2

Warm up automatically

Adaptive per-ISP curves build reputation. Circuit breakers keep you safe.

Hands-off
3

Monitor every inbox

Live placement and per-ISP reputation tell you exactly where you land.

Real-time
4

Scale with confidence

AI paces volume, fixes DNS, and flags risk before it costs you a domain.

Measurable
Why ZKemail

Built for senders, not generic automation

CapabilityZKemailWarmup toolsManual
Adaptive per-ISP warmup●partial—
Real inbox-placement testing●●—
PowerMTA ingestion●——
One-click DNS auth fixes●partial—
AI volume pacing●partial—
Competitive intelligence●——
Self-hosted option●—●

Enterprise infrastructure with the simplicity of a single dashboard.

Pricing

Simple, transparent, scalable

Start free. Upgrade when your volume does. Self-host at any tier.

Starter
For founders warming a first domain or two.
$49/mo
  • 3 sending domains
  • Warmup + inbox placement
  • DNS auth advisor
  • Email support
Start free trial
Most popular
Growth
For teams sending at real volume across ISPs.
$199/mo
  • Unlimited domains & seats
  • PMTA ingestion + AI trainer
  • One-click DNS fixes
  • Competitive intelligence
  • Priority support
Start free trial
Enterprise
For high-volume senders and agencies.
Custom
  • SSO + RBAC + audit logs
  • Self-hosted / on-prem
  • Dedicated infra + SLA
  • Account manager
Talk to sales
✓14-day free trial✓Cancel anytime✓No setup fees
Customer success

Senders who stopped landing in spam

+34%

"We went from guessing to knowing. Inbox placement is up 34% and we finally caught a DKIM mismatch that was quietly killing a domain."

DR
Daniel ReyesHead of Growth, Cortex
0→50k

"Scaled a new domain from zero to 50k sends a day in six weeks — without a single blacklisting. The warmup curves just work."

MK
Mara KesslerDeliverability Lead, pkexpo
−60%

"ARF complaints dropped 60% after we wired up auto-suppression and the AI trainer. It runs itself now."

SO
Sam OkaforCTO, Succor Leads
Enterprise ready

Secure, reliable, and built to scale

◈ Security

  • SOC 2 controls & GDPR-ready
  • Encryption at rest (AES-256-GCM)
  • SSO, RBAC & audit logs
  • Row-level tenant isolation

◎ Reliability

  • 99.99% uptime target
  • Self-healing send loop
  • Automatic backups & restore
  • Circuit breakers everywhere

⬢ Scale

  • Multi-tenant Postgres core
  • Millions of sends / month
  • Cluster mode + Redis adapter
  • REST API, webhooks & SDK
SOC 2
GDPR
SSO / SAML
Audit logs
Self-hosted
99.99% uptime
FAQ

Questions, answered

How long does onboarding take?+
Most teams connect their first sender and start a warmup in under 10 minutes. Point your SMTP or PowerMTA fleet at ZKemail, add your domains, and the adaptive curves begin immediately.
Do I need technical skills?+
No. Warmup, placement testing and DNS fixes are point-and-click. If you do run PowerMTA or your own DNS, ZKemail plugs straight into them over SSH and your registrar API.
Can I bring my existing domains and IPs?+
Yes — that's the point. Import your sending domains, IPs and SMTP configs, and ZKemail meets each ISP where its reputation already stands rather than starting from zero.
Is my data secure?+
Credentials are encrypted at rest with AES-256-GCM, tenants are isolated at the database row level, and every privileged action is audit-logged. SSO and RBAC are available on Enterprise.
Do you offer self-hosting?+
Yes. ZKemail runs as a self-hosted deployment on your own infrastructure (SQLite or Postgres) at any tier — your mail, your data, your network.
What happens after the trial ends?+
Nothing breaks. Pick a plan to keep going, or export your data. No credit card is required to start, and you can cancel anytime.

Ready to reach the inbox?

Join the senders already warming smarter, monitoring every ISP, and scaling without burning domains.

Start free trial Book a demo →
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