---
title: "Nikita Stoletov — LeadSonar"
description: "CTO designing cold email infrastructure and outbound systems at scale. Built and managed infrastructure delivering over 50M emails monthly across 1,200+ domains with 98% inbox placement."
canonical: "https://leadsonar.io/authors/nikita-stoletov"
last-updated: "2026-09-03"
---

> CTO designing cold email infrastructure and outbound systems at scale. Built and managed infrastructure delivering over 50M emails monthly across 1,200+ domains with 98% inbox placement.

LeadSonar [LeadSonar](https://leadsonar.io/)

Nikita Stoletov

Author

# Nikita Stoletov

CTO | Outbound Infrastructure & Deliverability Engineering

[LinkedIn](https://linkedin.com/in/nikita-stoletov)

CTO designing cold email infrastructure and outbound systems at scale. Built and managed infrastructure delivering over 50M emails monthly across 1,200+ domains with 98% inbox placement.

## Articles by Nikita

### [B2B Contact Data Accuracy: How to Measure It and Why Most Lists Fail [2026]](https://leadsonar.io/blog/b2b-contact-data-accuracy/)

[B2B contact data accuracy is the share of records that are deliverable, complete, and current against a verifiable ground truth. Across a 37,040-contact file, 99.98% had a valid MX record and only 0.55% hard-bounced. Here is the audit you can run and the benchmarks to score it against.](https://leadsonar.io/blog/b2b-contact-data-accuracy/)

[July 14, 2026](https://leadsonar.io/blog/b2b-contact-data-accuracy/)

### [How to Clean a B2B Email List (Without Killing Your Deliverability) [2026]](https://leadsonar.io/blog/how-to-clean-a-b2b-email-list/)

[A measured, step-by-step playbook for cleaning a B2B email list. Backed by first-party ground truth from a 37,040-contact sample where 99.98% had a valid MX record and only 0.55% hard-bounced when mailed.](https://leadsonar.io/blog/how-to-clean-a-b2b-email-list/)

[July 12, 2026](https://leadsonar.io/blog/how-to-clean-a-b2b-email-list/)

### [How to Improve Cold Email Deliverability (Data-Grade List Hygiene)](https://leadsonar.io/blog/how-to-improve-cold-email-deliverability/)

[Most cold email deliverability problems start in the list itself, before the sequencer ever runs. In a 37,040-contact outbound sample, 99.98% of addresses had a valid MX record and only 0.55% hard-bounced when mailed. Here is the data-layer workflow that produces those numbers.](https://leadsonar.io/blog/how-to-improve-cold-email-deliverability/)

[July 11, 2026](https://leadsonar.io/blog/how-to-improve-cold-email-deliverability/)