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Category: Infrastructure & Security

Build a Robust Email Foundation

Learn how to fortify your email infrastructure, enhance security measures, and implement authentication protocols to protect your communication.

Infrastructure & Security

DNS and Email: Why DNS Is Essential for Email Deliverability

Anna Borisova, January 19, 2026

When an email is sent, it doesn’t travel directly from sender to inbox. Behind the…

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Infrastructure & Security

Why Your HELO/EHLO Should Match Your From Domain (and How Misalignment Hurts Deliverability)

Anna Borisova, September 15, 2025October 2, 2025

HELO/EHLO Alignment: The Hidden Key to Better Deliverability When it comes to email authentication, most…

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Infrastructure & Security

Beginner’s Guide: Getting Started with KumoMTA

Sergey Syerkin, June 18, 2025June 19, 2025

KumoMTA is a modern, high-performance Mail Transfer Agent built for flexibility, throughput, and automation. Whether…

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Infrastructure & Security

DNSBL History and Why You Should Not Ignore Them

Sergey Syerkin, October 8, 2024May 12, 2026

A Critical Email Compliance Perspective A Brief History of DNSBL The term DNSBL stands for…

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Infrastructure & Security

Lookalike Domains: A Hidden Threat to Your Brand’s Email Security

Sergey Syerkin, September 30, 2024October 1, 2024

Your brand’s online presence is not only a business necessity but also a potential target…

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Infrastructure & Security

What Causes DMARC Failures?

Sergey Syerkin, September 11, 2024August 15, 2024

In the battle against phishing and email spoofing, DMARC (Domain-based Message Authentication, Reporting & Conformance) stands as a powerful ally. However, implementing DMARC isn’t always straightforward, and failures can occur. Understanding the common causes of DMARC failures is crucial for ensuring the security and deliverability of your emails. Today, we’ll dive into the primary reasons behind DMARC failures and how to address them.

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