Lead Generation

with Pay Per Call

Get 10, 20, or 30 calls a week from potential clients — or however many you need!

What We Provide

Maildoso is a complete solution provider for cold outreach.

We not only set up your infrastructure from scratch, but we also launch fully managed cold email campaigns — from audience segmentation to offer testing. As a result, your sales team gets demo requests from prospective clients, and you close more deals and grow your revenue.

Today, over 4,000 companies in the USA and around the world use our infrastructure. We send over 2.5 million emails on their behalf.

Why Work With Us?

We have extensive experience


We’ve successfully launched hundreds of campaigns — for ourselves and clients — across a range of industries. We know how to drive results in nearly any market.

We’ve also performed more than a hundred audits, and we know the most common mistakes—even those made by advanced players and lead gen agencies—and how to avoid them.

We have a reliable infrastructure


Maildoso provides cutting-edge cold email infrastructure.

Our mailboxes come with IP rotation — if any IP runs into trouble, it’s automatically replaced, and your campaigns keep running smoothly.

Additionally, we utilise a warm-up network comprising hundreds of AI agents that simulate real-user activity, ensuring your messages remain undetectable by spam filters.

We have a strong team


Our team brings together expertise in sales, marketing, data, and automation.

This means we:

– know communication and what converts, and what to avoid;

– base decisions on data, not guesswork;

– Use AI to personalise copy, streamline operations, and solve complex delivery problems.

Want to get your outbound up and running — and start seeing new leads this month?

Let's schedule a call to go over your project and explore ways we can boost your sales

How It Works

Step 1

Brief & Strategy Session

We start by getting to know your business, your goals, and your sales process. We then develop a tailored outbound strategy and a clear action plan.


Step 2

Infrastructure Setup

We register your domains, create mailboxes, and connect them to our warmup network, strengthening their reputation and reducing the risk of spam.


Step 3

Customer Profile (ICP) Discovery

We conduct in-depth research to find your ideal customer segments. We study your data (call recordings, surveys, customer profiles) to uncover their needs and preferences. This guides both our targeting and our messaging.


Step 4

Campaign Launch

We set up test campaigns to gauge your market’s response and find the best approach. This lets us validate hypotheses and fine-tune messages for maximum impact.


Step 5

Optimization & Scaling

Once we’re seeing strong results, we scale up. We listen back to calls, review responses, and use these learnings to continually improve campaigns — yielding more leads and more closed deals.

Wondering how much revenue you could generate?

Use our calculator to get a personalized sales forecast

Real results from our clients

Looks impressive?

What Maildoso Covers

Lead Generation and Cold Email Full-Service

Our own Cold Email Infrastructure

Our AI Warmup Network (with AI human-like actions)

Outbound Coaching Program

Community with 1,200+ outbound experts

What our customers say

Book a demo with our experts