The Email Infrastructure Problem Nobody Talks About

"You just need a different provider."

"You need cheaper accounts."

"You need better warmup tools."

None of that is your problem.

Your problem is what's under the hood of every account you've ever bought.

Most vendors aren't selling you infrastructure. They're selling you a login credential—usually on a loopholed Education or Non-Profit tier that was never meant for cold outreach.

That's not a sending system. That's a ticking clock.

Google and Microsoft aren't stupid. They know these loopholes exist. They patch them. And when they do? You're not a customer to them. You're an intruder. Your campaigns die overnight.

You've been playing cat and mouse.

And you've been the mouse.

Here's what your vendors never told you:

When you send Gmail-to-Gmail or Outlook-to-Outlook, your email stays on the inbound MTA route. It never leaves the provider's ecosystem. Fewer hops. Fewer checkpoints. The trust is implicit.

Cold outreach doesn't get that luxury.

Your traffic goes outbound—and that's where everything changes. Your email has to pass through the sending MTA, cross the public internet, hit the receiving MTA, survive the inbound Email Security Gateway (Proofpoint, Mimecast, Barracuda), and then face the inbox provider's own filters.

Each checkpoint is asking the same question: "Who is vouching for this sender?"

Here's what they're actually checking:

• IP reputation — Is your sending IP on a shared pool with 200 other cold emailers? (It probably is.)
• Domain age and history — Fresh domains get sandboxed. Burned domains stay burned.
• SPF/DKIM/DMARC alignment — Authentication proves you sent it. It doesn't prove you're welcome.
• Sending pattern analysis — Microsoft's SmartScreen and Google's AI detect cold email velocity signatures regardless of your copy.
• Engagement velocity — Replies within 24 hours boost you. Silence buries you.

And here's the kill shot: Your warmup is theater.

Google and Microsoft know the warmup tags. They know which "reply" accounts are bots. Warmup tools inflate your numbers inside a sandbox—but the moment you hit real prospects at scale, you're starting from zero reputation on the outbound route.

Loophole accounts don't have MTA-level signing. They have authentication—which anyone can set up in 10 minutes. That's the bare minimum to not get rejected outright. It's not a stamp of authority. It's a hall pass that says "this email wasn't forged."

That's why you plateau at 40% inbox rate and can't figure out why.

The filter isn't broken. Your infrastructure was never built for this route.

If you want to build real cold email infrastructure—not a gambling habit with a dashboard—your infrastructure has to pass three tests.

Miss one, and you're back on the hamster wheel.

We're not another account vendor. We don't resell logins. We don't exploit licensing loopholes and hope you don't notice.

We built something different.

Keter Infra is the world's first architected sending platform engineered for sanctioned, signed, and authorized cold email delivery.

What "Architected" Actually Means

Most vendors provision accounts. We engineered infrastructure.

The difference: every email that leaves our platform carries MTA-level signing as a baseline—not an upsell, not an add-on. It's baked into the architecture.

We didn't patch together loopholes and pray. We partnered directly with top-tier Microsoft CSP partners to build a proprietary delivery pathway that's designed for commercial outbound volume. The kind of sending that gets other vendors banned is what our infrastructure was built to handle.

The Seal on the Final Mile

Here's where the architecture pays off:

When your email hits the final checkpoint—the receiving provider's spam filter—it arrives bearing credentials that most cold emailers can't access. Our infrastructure carries provider-level authority at the point of delivery. Not just authentication. Not just a clean IP. A cryptographic seal that tells Microsoft Defender and Google's filters: this traffic is vouched for.

Competitors try to sneak in the back door.

We walk through the front—because we're on the list.

Built by Deliverability Engineers, Not Account Farmers

When you buy from a typical vendor, you're buying a login and a prayer.

When you buy from Keter, you're buying the accumulated knowledge of engineers who've spent years inside the deliverability trenches—consulting on high-volume campaigns, building relationships with ESPs, understanding exactly how reputation scoring works at the MTA level.

This isn't a side hustle reselling credentials. This is infrastructure designed by people who've seen what breaks—and engineered a system that doesn't.

You're not just getting accounts. You're getting architecture backed by expertise.

No more rebuild cycles. No more praying your batch lasts past day 30. No more "deliverability hacks" that work until they don't.

You get:

• →Sanctioned infrastructure that won't get audited out of existence
• →MTA-level signing on every email, automatically
• →Provider-level authority on the final mile of delivery
• →Expert-backed architecture instead of raw logins

Your campaigns run. Your pipeline stays full. You stop gambling and start sending.

Keter is for serious operators:

• →Cold email agencies sending 30,000+ emails per month
• →Growth teams who value sending stability over short-term savings
• →Operators who want to deploy infrastructure and get back to closing deals

This is NOT for:

• — DIY tinkerers who love fiddling with DNS to save $5
• — Spammers looking for burner accounts
• — Anyone who wants the cheapest option

If you're still reading this, you're probably in the first category. You've wasted enough time on infrastructure that breaks. You're ready for something that actually works.