Install the Unfair Advantage in Cold Email Deliverability.
The only cold email infrastructure with signed authority on the last leg into Gmail and Outlook—built by deliverability engineers, not loophole farmers.
Works with your sequencer
The Problem
You've tried multiple providers. You've warmed accounts for weeks. You've followed every best practice. And you're still getting suspended.
Buy accounts. Warm for 3 weeks. Send for 2 weeks. Suspended. Repeat. You've spent more time rebuilding than actually sending.
Open rates stuck in the 30-40% range no matter what you try. Your copy isn't the problem. Your infrastructure is throttling you.
Thousands spent on accounts that got banned. Warmup tools that didn't prevent anything. Consultants who blamed your copy.
"You just need a different provider." "Try this new warmup method." "Your copy is triggering spam filters."
The truth: Your problem isn't your provider, your warmup, or your copy. Your problem is what's under the hood. You're sending from infrastructure that was never designed for commercial outreach—and Gmail knows it.
The Solution
Not another inbox provider. Not another resold license. Purpose-built infrastructure with signed authority at the MTA level.
Most providers resell access through loopholes that Microsoft actively hunts. We operate sanctioned infrastructure—purpose-built tenants designed for commercial sending.
What this means:
No Terms of Service violations. No audits. No mass suspensions.
Standard DKIM/SPF authenticates that you sent the email. Our MTA-level signing means the sending server cryptographically vouches for your traffic.
What this means:
Not just authenticated—vouched for. The infrastructure itself has reputation.
When your email hits Gmail or Outlook, it arrives from infrastructure they recognize and trust. Provider-level authority at the point of delivery.
What this means:
Your traffic is expected, not filtered. You're on the guest list.
Comparison
Loophole Providers
Keter Infrastructure
Infrastructure Type
Resold/loopholed licenses
Sanctioned commercial tenants
Authentication
DKIM/SPF only
MTA-level signing + DKIM/SPF
Provider Trust
Unknown sender
Recognized authority
Suspension Risk
High (ToS violations)
Minimal (sanctioned use)
Longevity
Ticking time bomb
Engineered asset
What You Get
Bring your domain. We build the infrastructure. You start sending.
100
Configured Mailboxes
Per domain, ready to send
MTA
Signed Authority
Server-level vouching
48h
Deployment Time
DNS to sending
24/7
Monitoring
Infrastructure oversight
60 seconds. No calls required.
Bring your own. We handle DNS.
Mailboxes configured. MTA signing active.
IMAP/SMTP to your sequencer.
Your Dashboard
Active Domains
24
All healthy
Mailboxes
2,400
configured
Infrastructure
Signed
MTA-level
System Status
Pricing
Bring your domain. Get 100 configured mailboxes with MTA-level signing. Ready in 48 hours.
FAQ
Those tools are sequencers—they send emails. We provide the infrastructure layer underneath. Most inbox providers sell you loopholed access that violates Terms of Service. We operate sanctioned infrastructure with MTA-level signing. You can use Keter with Instantly, Smartlead, or any sequencer.
Most suspensions happen because providers use loopholes that Microsoft actively hunts. Our infrastructure is sanctioned for commercial use from the start. There's no Terms of Service violation to catch.
Standard email authentication (DKIM/SPF) proves you sent the email. MTA-level signing means the sending server itself cryptographically vouches for your traffic. It's the difference between having a valid ID and being on the VIP list.
You bring your domain, point DNS to us, and we deploy 100 configured mailboxes within 48 hours. You receive IMAP/SMTP credentials to connect to your sequencer.
The infrastructure comes with established reputation. Most users ramp volume gradually as a best practice, but you're not starting from zero like with fresh accounts.
Sanctioned infrastructure doesn't face mass suspensions. If individual issues arise, our team handles resolution. You focus on campaigns—we manage infrastructure.