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A snowman holding an envelope with KumoMTA on it.
Release, MTA, On-Prem, mailops

The Winter 2025 Release

The Fall release of KumoMTA was only six weeks ago and was one of the largest, with more than 20 enhancements. That...
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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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Release, MTA, On-Prem, mailops

What we did on our summer vacation. JK - this is a big one

You have waited much longer than normal for a new KumoMTA release, but the wait is over. We spent the summer grinding...
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MTA, On-Prem, Postfix, Sendmail, Open-Source, Multi-Tenant, Traffic Shaping, mailops, alternative, replacement

Still on Postfix? Lets talk about KumoMTA

Postfix is probably the most recognizable and most accessible email engine available. That does not mean it is the best...
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MTA, KumoMTA, hack

Investing in the next generation

I normally fill this blog space with handy tips about using KumoMTA, but this one is a bit different. I want to talk...
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MTA, On-Prem, Open-Source, momentum, SMTP, mailops, Case Study

Case Study - AWeber

I wanted to share our latest case study with you, it's all about how our good friends at AWeber made the move from...
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On-Prem, Open-Source, mailops, global, locations, international

A tale of growth and expansion

From the beginning, the KumoMTA concept was to build something that transcended borders and challenged how people think...
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MTA, KumoMTA, infrastructure, how to, tutorial

The elusive tutorial

The KumoMTA team answers a metric tonne of questions every week about open-source software, the KumoMTA code, and our...
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MTA, KumoMTA, mailops, email, infrastructure, fast, cpm, roi

KumoMTA Performance Update

Way back in July 2023, we wrote about KumoMTA's performance testing and made some pretty big claims. Since then, we...
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Release, Cloud, On-Prem, Open-Source, mailops, control, flexibility

The 2025 Spring Release

Only 48 days after the last stable release, we bring you even more MTA goodness. This week, KumoMTA published the...
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