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From "Send" to "Delivered": My 15-Year Journey in the Email Trenches

  • Writer: Mykhaylo Sydorenko
    Mykhaylo Sydorenko
  • Oct 31, 2025
  • 3 min read

Updated: Dec 2, 2025

If there is one thing I’ve learned over the last 15 years, it’s that hitting "Send" is the easy part. The real work—the art and the science—happens in the milliseconds between that click and the moment an email lands in the inbox.


My career didn't start in the server room. It started where most marketers do: focusing on campaigns, content, and open rates. But as I navigated through some of the most competitive and high-volume industries in the digital space, my focus shifted from what we were sending to how it was being delivered.


Here is a look at my path from Product Manager to Deliverability Expert, and why I now dedicate my time to helping businesses solve their most complex email puzzles.



1. The Foundation: Mastering the Mechanics


Early in my career, my world revolved around the product side of CRM. I was deep in the weeds of campaign implementation, managing resources, and negotiating with gateways.


I quickly realized that a great retention strategy is useless if the technical foundation is shaky. It wasn't enough to just write a technical task for a developer; I had to understand the "why" behind every bug. This period taught me the full lifecycle of a message—from the database to the user’s screen—and the importance of ROI in every notification we sent.



2. The Scale: Managing 30 Million Emails a Day


The turning point in my career came when I took on the challenge of massive scale. I wasn't just managing campaigns anymore; I was managing infrastructure.

I moved into roles where I was responsible for sending volumes that grew from zero to 30 million emails daily. When you operate at that scale, standard practices don't apply. You can't just rely on a standard Email Service Provider (ESP) to do the heavy lifting.


I had to become an architect. I helped build and support home-grown email systems, managed complex MTA configurations (throttling, IP warmup), and handled relationships with ISPs and blacklist providers. I learned that deliverability isn't luck; it's a negotiation between your infrastructure and the receiver's rules.

Laptop on a wooden table with a glowing screen showing emails. Warm, blurred lights and a plant are visible through a window in background.


3. The Migration: Owning the Platform


As my expertise grew, so did the complexity of the challenges. I led projects to migrate entire CRM streams from external services (like SendGrid) to internal, proprietary platforms.

This wasn't just about saving money; it was about control. By building and migrating to our own platforms, I helped companies regain ownership of their data and their reputation. I managed the full scope of omnichannel communication—SMS, app-push, web-push, and email—ensuring that every channel was not just active, but profitable.




4. The Specialist: Solving the "Impossible" Puzzles


oday, I operate at the intersection of operations, finance, and technical strategy.

I’ve worked in verticals where the odds are stacked against you—industries where spam filters are aggressive and user retention is a battle. Surviving in those environments made me a problem solver. whether it's configuring DNS records, auditing a damaged sender reputation, or finding a profitable route for SMS delivery, I’ve seen it and solved it.



Why This Matters for You


 didn't launch my consultancy to just run campaigns. I launched it to build roadmaps. I help businesses who are tired of guessing why their emails are going to spam. I bring 15 years of "in the trenches" experience—building systems, fighting blacklists, and driving ROI—to your team.

Let’s stop hoping for deliverability and start engineering it.

 
 
 

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