Recent Articles

Recent Articles

MTA, On-Prem, KumoMTA, security, mailops, global

El enchante Barcelone

Two weeks back from Deliverability Summit 2026, and the enchantment of Barcelona still lingers in our memories. If you...
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Release, Announcements, MTA, On-Prem, KumoMTA, General Availability, security, mailops, global

Announcing the KumoMTA Astronomical Spring 2026 Release

A Spring Tune-Up: The April 2026 Release Back when we announced the Spring 2026 release some of you pointed out that it...
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Release, Announcements, MTA, On-Prem, KumoMTA, General Availability, security, mailops, global

Announcing the KumoMTA Spring 2026 Release

It's not every day you get to celebrate an MTA's Sweet Sixteen, but here we are: today marks the sixteenth release of...
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Meet KumoMTA in San Diego sticker
MTA, On-Prem, KumoMTA, security, mailops, global

It Never Rains In California

Recently, we attended an industry conference in sunny Southern California. This is a fairly important conference from a...
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On-Prem, Open-Source, security, email, antivirus, mime

Digging MIME

One of the common requests we get is about examining the message by parts to perform security checks, redact private...
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security, Deliverability

Protect Your Deliverability With An Abuse Page

When you operate a multi tenant sending environment compliance is a major portion of your operations, and yet on...
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MTA, On-Prem, KumoMTA, Open-Source, Lua, Rust, security

Using LetsEncrypt with KumoMTA

Handling email over TLS-encrypted connections has become the default, and KumoMTA supports TLS for all messages in and...
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MTA, On-Prem, KumoMTA, Open-Source, security, SMTP

Defending Against SMTP Smuggling with KumoMTA

What is SMTP Smuggling? On September 18th there was a new exploit published regarding SMTP Smuggling, which you can...
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MTA, On-Prem, KumoMTA, Open-Source, momentum, powermta, pmta, DKIM, security

Lets talk about security for a minute

Email has evolved considerably in the last decade, but modernization efforts at the server level have lagged behind...
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