outbound depends on
Domains, mailboxes, warm-up and deliverability checks are not exciting. They are also the difference between a campaign that lands and one that gets filtered before a human ever sees it. Infrabox puts all of it in one platform.
A small team building email
infrastructure in one platform
We kept rebuilding the same spreadsheet
Before Infrabox, the three of us ran outbound infrastructure for a handful of agencies out of a shared office in Delhi. Every new client meant the same week of work: buy a batch of domains, set up mailboxes across two or three providers, hand-write SPF and DKIM records, wait for propagation, then babysit warm-up in a shared spreadsheet that someone inevitably broke by sorting the wrong column.
Domain setup lived in one tool, mailboxes in another, warm-up in a third, and blacklist checks, list validation and inbox placement tests in three more. Nothing talked to anything else, and every problem was found after a campaign had already gone out.
In 2026 we built the platform we wanted: domains, mailboxes, warm-up, export, Email Insights, InfraGuard, Email Validate and Inbox Placement in one place. Infrabox launched in September 2026.
Last edited by Priya, 11:47pm: “fixed?? check again”
Domain score, blacklist, DNS and bounce checks in one view
Opinions, not platitudes
Years of running email infrastructure by hand taught us a few things we hold to on every roadmap call.
Infrastructure should be boring
If a domain, a mailbox or a DNS record ever needs your attention twice, we consider that a bug in Infrabox, not a fact of life.
You own the assets, not us
Domains, mailboxes and reputation are registered and billed in your name. Leave any time and take every asset with you.
Deliverability is measured, not promised
We publish the placement, bounce and blocklist data our own detection sees. No vague ‘inbox guarantee’ language anywhere.
Ship the unglamorous thing
A correct MTA-STS record ships before a nicer settings page does. The roadmap is ordered by what breaks sends, not what demos well.
Support from people who provisioned the fleet
Everyone on the deliverability rota has personally set up a cold domain. Tickets get answered with commands, not scripts.
Process that matches the product
The same discipline we ask of a sending fleet, we ask of ourselves.
Remote-first, always
No headquarters. The team works across 9 time zones and meets in person twice a year.
4-day release cadence
Every change to the platform ships on a fixed four-day train: small diffs, fast rollback.
On-call deliverability rota
A named engineer owns inbox placement and blacklist alerts every week, with a 15-minute response target.
Public changelog
Every shipped change is logged with what changed and why, including the ones that were reverted.
Built in 2026, launched September 2026
A new company with one job: put the whole email infrastructure workflow in one place.
- Early 2026
The idea becomes a plan
We map the full email infrastructure workflow, from domain to inbox placement, and decide to build it as one platform instead of eight separate tools.
- Mid 2026
Domains, mailboxes and warm-up come together
Domain management, mailbox setup across Google Workspace, Microsoft Outlook, Microsoft Azure and custom providers, and our warm-up network are built as one flow.
- Aug 2026
Export and Email Insights
Mailboxes can be exported to the sequencer of your choice with progress tracking, and Email Insights shows sent, received, reply rate, bounces and health in one view.
- Sep 2026
Infrabox launches
Infrabox opens to everyone at infrabox.software, with InfraGuard, Email Validate and Inbox Placement available as add-ons from day one.
Infrabox, at a glance
The facts that shape the product, straight from how Infrabox works today.
0
Tools in one platform, from domains to inbox placement
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Mailboxes per domain on plans of $1,000+
0 wks
Recommended warm-up, 2 weeks minimum
$0
Warm-up per mailbox / month
Eight people, one sending fleet
Small on purpose. Everyone here has personally provisioned, warmed, or rescued a cold domain.
Priya Natarajan
Co-founder & CEO
Ran deliverability for three outbound agencies before Infrabox existed.
Marcus Feldt
Co-founder & CTO
Wrote the first DNS orchestration script Infrabox is still built on top of.
Aiko Tanaka
Head of Deliverability
Owns the warm-up network and the blacklist-monitoring rota.
Diego Suárez
Staff Engineer, Provisioning
Built the bulk mailbox provisioning path that ships in under a minute.
Ngozi Adeyemi
Product Design Lead
Designs the console so a fleet of 500 mailboxes still reads at a glance.
Felix Bergström
Engineering Manager, Platform
Keeps domains, mailboxes and warm-up running on one reliable platform.
Sana Malik
Customer Deliverability Engineer
First responder on the on-call rota when a domain's placement drops.
Owen Kowalski
Head of Revenue
Talks to agencies and RevOps teams about running hundreds of domains and mailboxes in one place.
Open roles
Join a small team that owns the unglamorous layer end to end, and gets paged for it.
Run your sending fleet on infrastructure you own
Connect your first domain in minutes, or talk to the team that built Infrabox.