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Cold email infrastructure

Cold email infrastructure that actually lands.

Buy domains, provision live mailboxes, and ship to your sending tool. Two-minute setup, mailboxes live within 30 minutes.

  • No credit card
  • Cancel anytime
  • Billed only once live
  • Live in minutes
Example fleet
illustrative example
Mailboxes live
818
sample figure, not fleet state
Auth on every box
DKIM · SPF · DMARC
2048-bit · strict · quarantine
Per mailbox / mo
$2.50
billed only once live
frederik@danishlead.colivejust now
sofie@danishlead.colive2s
lucas@example.comwarming · day 36s
emma@example.netlive14s
Product tour

Watch a fleet go live.

The whole InboxLee setup flow, start to finish, in under a minute.

Under a minute · no audio needed
  • Google Workspace
    Official partner-program provisioning
  • Microsoft 365
    Official CSP partner provisioning
  • DKIM 2048 · SPF · DMARC
    Authentication on every mailbox
  • GDPR compliant
    SOC 2 in progress
The problem

Your cold email fails before you send.

It is not your copy. It is not your list. It is the infrastructure you skipped.

Wrong DNS

4records to nail. Missing SPF, weak DKIM, absent DMARC. Gmail puts you in spam before your first send.

SPFDKIM 2048-bitDMARCMX

Cold domains

14days warmup before commercial outbound. New domains need warmup time. Skip it and providers flag you for commercial outbound.

Day 1-3 trickleDay 4-10 rampDay 14 live

Too many per domain

2-3mailboxes per domain is the ceiling. Crowding 4 or more mailboxes onto one domain hurts inbox placement at Gmail and Outlook. The safe ratio is 2 to 3, and we enforce it at checkout.

2 ideal3 max4+ kills inbox rate
Built for global outbound

Infrastructure that lands worldwide.

Provisioning through the official Google Workspace and Microsoft 365 partner programs gives every mailbox the authentication footprint Gmail, Outlook, Yahoo, AOL, and iCloud already trust.

Industry benchmark
DKIM · SPF · DMARC
76-83%Cold email inbox placement

Validity State of Email Deliverability 2024: the published rate for cold email that reaches the inbox. Every InboxLee mailbox ships with DKIM 2048-bit, SPF, and DMARC, the authentication floor that rate assumes. InboxLee does not run fleet-wide seed tests, so this is a cited industry number, not our own measurement.

Works withGmailOutlookYahooAOLiCloud
  • Official partner provisioning
    Google Workspace today, Microsoft 365 next - never resold.
  • Full authentication, every box
    SPF and DMARC quarantine applied and verified, DKIM 2048-bit driven and tracked per domain.
  • Daily fleet monitoring
    6-source blacklist scans across every sending domain in the fleet.
How it works

Three steps. Six things automated.

Two-minute setup. Every step accounted for.

01

Buy domains

Pick a name, we register it. DNS authentication applied automatically.

Automatic domain setup
Registration handled at checkout. Best available pricing across our providers.
Full DNS suite
SPF, DMARC quarantine and MX applied and verified; DKIM 2048-bit driven and tracked.
02

Provision mailboxes

Live mailbox provisioning through the official Google partner program. Microsoft next. Credentials delivered securely.

Live provisioning
2 to 3 mailboxes per domain, the deliverability sweet spot. Spun up in ~90 seconds, no mixed tenants.
Credentials delivered
One-time secure link with a 24h expiry. We do not store them after delivery.
03

Connect + Monitor

Push the mailbox into your cold-email tool. We check your domains against the blacklists every day and alert you on any listing.

Connect to your tool
One-click export to Smartlead, Instantly, Lemlist, Apollo, Outreach, Reply.io, or our API directly.
Blacklist monitoring
6-source blacklist scan plus DNS and authentication health, checked daily on every sending domain.
Integrations

Plays with the tools you already use.

Native one-click export for the cold-email tools our customers actually run. Custom webhook + REST API for everything else.

SmartleadInstantlyLemlistApolloApolloOutreachReply.io{ }API + WebhookSmartleadInstantlyLemlistApolloApolloOutreachReply.io{ }API + Webhook
Pricing

Honest pricing.
No seats. No minimums.

Pay per mailbox, only once it is live. Domain is charged once at checkout. Cancel any mailbox or domain anytime.

Most popular
Live now

Google Workspace

$2.50/ mailbox / month

Domain included. Blacklist monitored. Export to your tool.

Start now
  • Pooled Google IPs
  • Automated DKIM, SPF, DMARC setup
  • Unlimited mailbox export to any provider
  • Buy or connect your existing domains
  • Zero DNS edits · we handle everything
  • US / EU mailbox regions
  • AI assistant + 1-hour email reply
Live now · skip warmup

Pre-warmed mailbox

$5.00/ mailbox / month

Fresh Google or Microsoft accounts, warmed for you. Never used by anyone else.

See how it works
  • Fresh Google Workspace or Microsoft 365 account
  • Warmed 14+ days in our controlled environment
  • Never touched by another customer
  • Domain + DNS authentication included
  • Send cold day one, no warmup curve
  • 6-source domain blacklist monitoring
  • AI assistant + 1-hour email reply
Coming soon

Microsoft 365

$2.50/ mailbox / month

Official Microsoft 365 CSP partner. Same provisioning pipeline.

Get notified
  • Pooled Microsoft IPs
  • Automated DKIM, SPF, DMARC, MX setup
  • Unlimited mailbox export to any provider
  • Buy or connect your existing domains
  • Zero DNS edits · we handle everything
  • Same blacklist monitoring as Google tier
  • Provisioning launching this quarter
Coming soon

Lee SMTP

$5.00/ mailbox / month

Dedicated IPs and warmed pools for senders pushing 200k+ emails per month.

Join the waitlist
  • Custom /28 IP block, fully isolated
  • Microsoft JMRP + Yahoo FBL pre-registered
  • Phased IP warming schedule built in
  • Unlimited mailbox export to any provider
  • Buy or connect your existing domains
  • Priority support + SLA
  • For senders pushing 200k+ per month

Domain registration is a one-time line item on your first invoice · cancel any mailbox or domain anytime

ROI calculator

See your savings in seconds.

Move two sliders, see what InboxLee costs versus running deliverability in-house. Honest math, no marketing inflation.

Example · 100 mailboxes · 15 sends/day
With InboxLee
$250/mo
$2.50/mailbox × 100
DIY in-house
~$7,750/mo
Engineer + monitoring + IPs + dev
Annual savings
~$90,000
About

Direct. Official. No middleman.

InboxLee provisions Google Workspace and Microsoft 365 mailboxes directly through the official partner programs - no resellers in the loop, no rate-limit surprises, full vendor support behind every mailbox we ship.

Official Google Workspace partnerOfficial Microsoft 365 CSP partner
More about InboxLee
Pulse AI · only on InboxLee

The only infrastructure with a copilot on duty.

Pulse reads your real domains, records, and mailboxes every day, tells you what is broken and where to fix it, and asks before anything risky.

Watches every mailbox so you don't have to
SPF, DKIM, DMARC and MX records, mailbox status, and 6 domain blacklists, checked daily.
Tells you exactly what to fix
Flags blacklist listings, failing authentication records, and suspended mailboxes, each pointing at the page that resolves it.
Asks before anything risky
DNS policy changes, like tightening DMARC to p=reject, always wait for your approval. Guardrails you control.
Pulse · sample feed
illustrative example
2 domains flagged on a blacklistwatching
A listed domain drags you down at every inbox provider. Open Deliverability to file a removal request.
Tighten DMARC to p=reject on 4 domainsneeds approval
These domains are passing SPF and DKIM. Pulse never changes DNS policy without your approval.
3 mailboxes are suspendedwatching
Suspended mailboxes are not sending. Review them on the Mailboxes page to resume or replace them.
FAQ

Ten questions before you sign up.

Customer story

“InboxLee shipped our last cohort of mailboxes faster than my own team could've set up the DNS. Domains bought, records applied, mailboxes ready, zero hand-holding.”

FJ
Frederik Jakobsen
Founder & CEO, Danish Lead Co and SourceRank AI
0
mailboxes shipped for Frederik's team
0
DNS edits the team had to do

Two-minute setup. Sending the same day.

No credit card. No contracts. Every mailbox billable only once it is live.

GDPR compliantSOC2 in progressGoogle PartnerMicrosoft Partner