Email Infrastructure Setup & Configuration
Email infrastructure is everything between your email and the inbox: sending domains, mailboxes, DNS and authentication records, your ESP or sequencer, and the reputation you build by warming them. We design and build it for how you send, then warm it before it carries real volume.
That's why we don't provide a one-size-fits-all solution. We tailor each client's tech stack, whether marketing, cold email or transactional, to their individual needs.
- From $999
- 1 week to build
- Warmed before launch
- Tested placement checked before you scale
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Infrastructure We've Built
What Infrastructure Clients Say
Read all reviewsFormula Inbox launched an email list with tens of thousands of subscribers that we had let go cold and hit an incredible 50%+ open rates. Their depth of knowledge on strategy and deliverability was the difference maker. Kind, sharp, and genuinely cared. Looking forward to working with them again.
Formula Inbox was exactly what we needed. They understood the project, planned and drove it to completion, and took the initiative every week to keep us on track. Could not have asked for a better experience.
How an Infrastructure Build Works
Starting at $999- 1
Assess and Plan
We review your current setup and where you want to send, then design the architecture: which domains and subdomains carry which mail, how many mailboxes you need, and which ESP or sequencer runs each program. This takes 3 to 5 days.
- 2
Build and Configure
We set up your domains, mailboxes, DNS records and sending platform to match the plan, so every program sends from the right place with full authentication. The build is complete within one week.
- 3
Warm
New domains, mailboxes and IPs start with no reputation, so we ramp volume in stages. Each increase is gated on what Google Postmaster Tools and other reputation data show, not on the calendar. Warming and ramp can take up to 60 days. For new cold outbound domains, plan on four to six weeks.
- 4
Test Before Launch
Before your program carries full volume, we run a baseline inbox placement test across Gmail, Outlook, Yahoo, Google Workspace, Microsoft 365 and the major corporate filters, so you launch knowing where your mail lands.
- 5
Launch and Hand Over
You take the build and run it yourself, or move onto ongoing monitoring so warming, reputation and placement stay watched as you scale.
Email going to spam right now? Get a free diagnosticortalk to a human
What We Build, by Program Type
Cold outbound, marketing and transactional email need different infrastructure. Mixing them on one domain is one of the most common root causes we find.
| Program | What we build | What matters most |
|---|---|---|
| Cold outbound | Separate sending domains, several mailboxes per domain on Google Workspace or Microsoft 365, connected to your sequencer and rotated so no domain carries continuous cold volume. | What matters mostKeeping cold mail off your primary domain, and keeping each inbox under 30 sends a day. |
| Marketing | An authenticated sending subdomain on your ESP, a branded link-tracking domain, one-click unsubscribe and a cleaned list before the first send. | What matters mostA ramp that starts with your most engaged contacts and grows only as reputation holds. |
| Transactional | Its own subdomain and stream, separate from marketing, so receipts, password resets and alerts keep their own reputation. | What matters mostSpeed and reliability. These are the emails customers wait for. |
| Your primary domain | Google Workspace or Microsoft 365, full authentication and DMARC on a path to enforcement. | What matters mostProtecting the domain your clients and team rely on every day. |
See why separation matters in the cold email deliverability guide and why transactional email goes to spam.
Who It Is For
New email programs being set up for the first time.
Teams moving to a new ESP or sending platform.
Cold outbound teams that need separate domains and mailboxes.
Domains already burned, or not sure what is broken? Start with an email deliverability audit. Rebuilding damaged infrastructure is part of the fix that follows it.
Frequently Asked Questions
What does an infrastructure build include?
Domain and mailbox architecture, DNS and authentication setup, warming, and ESP or sequencer configuration, sized to your volume and program type. For cold outbound that means the domain and mailbox count that supports your target send volume without burning reputation. We design it so the sending footprint and the warming plan match the way you actually intend to send.
How much does email infrastructure setup cost?
Infrastructure builds start at $999. The price goes up when a longer warming and ramp period is needed. If you are moving to a new ESP or domain, managing warming, cutover and ramp can take 3 to 12 weeks. Domains, Google Workspace or Microsoft 365 licenses, ESP fees and warm-up tools are paid directly by you.
How long before we can send at volume?
Warming is the gate, not the setup. Fresh domains and mailboxes need a warming ramp before they carry real volume, and rushing it is the fastest way to land in spam. Timelines depend on volume targets, but plan for a staged ramp rather than a switch you flip on day one.
How many domains and mailboxes do I need for cold email?
Start from your daily send target and keep each inbox under 30 cold sends a day. That gives you a mailbox count, which you then spread across several domains so one flagged domain doesn't stop your program. One recent build ran six domains with five mailboxes each.
Can I send cold email from my main domain?
We don't recommend it. When cold outreach and business email share a domain, complaints from cold sends drag down the domain your clients and team rely on. In two of our case studies, moving cold sending onto separate domains is what fixed the problem.
Do I need a dedicated IP?
We recommend a dedicated IP for senders sending more than 1,000,000 emails a month. Below that volume, a shared IP pool on a reputable ESP is usually the better choice.
Can you move us to a new ESP without hurting deliverability?
Yes. We set up and authenticate the new platform alongside the old one, warm it, and move volume over in stages, starting with your most engaged contacts, instead of switching everything in one day. Warming, cutover and ramp to a new ESP or domain take 3 to 12 weeks.
Can you rebuild infrastructure that is already burned?
Do you handle Google Workspace, Microsoft 365, or both?
Both, and the choice matters. Microsoft placement issues push many cold outbound programs toward a Google-first footprint, while marketing and transactional programs have different tradeoffs. We architect around where your mail actually needs to land.
Do you manage it after it is built, or hand it off?
Either. Some clients take the build and run it themselves. Others move onto an ongoing retainer so warming, reputation, and placement stay monitored as the program scales. The build stands on its own regardless of which you choose.
Take the Next Step With Formula Inbox
Industry Experts
Our team of email deliverability managers possesses deep experience in email deliverability, anti-spam compliance, and email infrastructure.
Data-Driven Approach
We utilize advanced analytics to identify why your emails aren’t reaching inboxes.
Proven Fixes & Best Practices
We don’t just consult; we implement solutions that work.
Customized Solutions
Every email program is different. We tailor our recommendations specifically to your needs.
100% Compliance-Focused
We help your emails comply with GDPR, CAN-SPAM, CASL, and other global regulations.