How Mailin 10x'd their outbound and broke into entirely new markets

A cold outbound infrastructure company scaling past $1M ARR, well known inside the cold email ecosystem, and completely unknown outside it. We built the system to change that. Here is what happened.

Company: Mailin Industry: Cold Outbound Infrastructure / SaaS Location: United States Campaign type: High-volume outbound for new market penetration Engagement type: Ongoing

Results at a glance

Where Mailin started

Mailin provides cold outbound mailbox infrastructure for B2B teams. Their product sits at the core of how sales teams send at scale — domains, mailboxes, warmup, and deliverability. By the time they came to us, they had already scaled past $1M ARR and built a strong reputation inside the cold email ecosystem.

The problem was not growth inside that ecosystem. The problem was everything outside it.

Before The GTM Company:

• Strong product, strong reputation — but only within the cold email practitioner community

• New markets with genuine need for the product had no awareness of Mailin

• Traditional content and community plays were not fast enough for new market penetration

• No proactive outbound system built for buyers outside the existing ecosystem

• A founder with no time to manage agencies or run lengthy briefing cycles

Tomer had built the business by being known in the right circles. Cold email practitioners, outbound agencies, and growth-focused sales teams already knew who Mailin was. But that market has a ceiling.

"I told him: I am a founder who does not have time to deal with agencies. You should just know the goal and go get results. And he has done that." — Tomer, Founder and CEO of Mailin

Our approach

The brief was unusually clear. No hand-holding. No lengthy onboarding. No check-ins to explain the basics. Take ownership of the entire outbound motion and report on results.

That suited us. We took the goal — break into new markets — and went to build the system to achieve it.

The core challenge was messaging. Mailin's product is obvious to anyone who does cold email. To everyone else, the value proposition needed to be rebuilt from scratch. We could not assume the buyer knew what a warmup domain was or why they needed one.

01 — Find the markets first, then build the message We identified verticals with a genuine need for cold outbound infrastructure but no existing awareness of Mailin. New segments required new positioning — not a rephrasing of what already worked inside the ecosystem.

02 — Iterate fast until new angles converted No waiting for a quarterly review. We ran rapid iteration cycles on messaging and scaled volume as soon as winning campaigns were identified.

03 — Full ownership, no management overhead Tomer did not have time to run an agency. We ran the engagement independently — targeting, messaging, infrastructure, and iteration — and reported on what was working.

What we built

High-volume outbound for new market penetration

Identified target verticals with a genuine need for cold outbound infrastructure but no existing awareness of Mailin. Built clean, validated prospect lists across new buyer segments. Developed messaging frameworks that explained the product's value to audiences unfamiliar with cold email tooling. Ran rapid iteration cycles on messaging until new market angles started converting. Scaled outbound volume as winning campaigns were identified — 10x from the starting point.

The GTM Company flywheel

Mailin already knew the cold email world inside out — it was their product. What made the flywheel powerful here was that every conversation we booked fed directly back into sharper positioning for the next campaign.

We learned fast what messaging cut through outside the cold email echo chamber, what pain points resonated with new markets, and which buyer types converted. That intelligence compounded every cycle, and the outbound volume scaled with it — 10x from where they started.

01 — Real world intelligence Case studies, call recordings, and customer conversations

02 — Offers and messages Positioning and copy built from what real buyers say

03 — Outbound data Reply rates, open signals, and booking data show what lands

04 — New sales conversations Warmer leads, better meetings, faster closes

Every new sales conversation feeds back into step 01. The flywheel compounds with every cycle.

The results

Mailin's outbound volume has scaled 10x since the engagement began. More importantly, they are now reaching and converting buyers in markets that previously had no exposure to the product — expanding the total addressable market rather than competing harder for the same pool of buyers.

Tomer has hired over two dozen agencies across content, outbound, and ads. We are one of two that have delivered a positive ROI.

"We have hired at least two dozen agencies at this point. Cam is one of two that has generated us a positive ROI. Money in, money out. It makes a lot of sense for us." — Tomer, Founder and CEO of Mailin

What made this work

01 — We were given the goal, not the brief Most agency engagements fail because the founder ends up managing the agency. Tomer gave us the outcome he wanted and stepped back. That model only works when the agency actually knows what it is doing — and it is the only model that scales.

02 — New markets required new positioning, not recycled messaging Taking the copy that worked for cold email practitioners and sending it to companies who had never thought about outbound infrastructure was never going to convert. We rebuilt the value proposition from scratch for each new segment.

03 — Iteration speed determined everything The difference between finding a new market angle in week two versus week ten is almost entirely iteration speed. We changed what was not working immediately, not at the next monthly review.

04 — One of two out of twenty-four Tomer's framing of the result is the most honest benchmark for agency performance we have seen. Most agencies burn budget and disappear. We are still running the engagement because it produces a return.