Recent Articles
We're pleased to announce the Winter 2025 release, now available through our repos and Docker container.
We've Been Busy It's been a busy year for us here at KumoMTA. We've built three major releases, traveled the world...
One of the things that is incredibly important for any MailOps engineer is system observability. That is a big fancy...
We're pleased to announce the Fall 2024 release, now available through our repos and Docker container.
One thing many ESPs have in common is the risk created by self-serve signups: a new user signs up for a free or even...
In the last few months, we have seen a great deal of growth in the number of people moving from other systems to...
Summer is coming to an end, and we're finishing it off with a new production release. While this particular release...
One of the questions we have heard since the beginning of KumoMTA has been, "Where is the reporting web UI?" We almost...
In case you missed it, the KumoMTA Spring Release is now available in GA! One of the hot items in the release list is a...
My favorite part about KumoMTA being Open-Source is our growing community. They not only help each other in our...
KumoMTA was created as a platform for others to build email services on. Our extensive documentation was written...
We're pleased to announce that the new KumoMTA Spring Release is now available in GA!
When you operate a multi tenant sending environment compliance is a major portion of your operations, and yet on...
The world is changing. There is a quiet revolution going on right under our noses. It has been building for years and...
NOTE: This post was originally written for Spam Resource, the initial publication can be seen at...
“First they ignore you, then they laugh at you, then they fight you, then you win.”
Handling email over TLS-encrypted connections has become the default, and KumoMTA supports TLS for all messages in and...
tl,dr: KumoMTA is not just Open-Source, it's also the best MTA on the planet for large-scale senders.
It was one year ago that KumoMTA was officially born, with Wez making the first commit to the main repo (see it here)!
If you are a Microsoft fan and want all your tech to be Microsoft branded, you likely have felt a little disappointed...
There are only a handful of email MTA engines capable of operating at the speeds KumoMTA does. One that was popular in...
Our next Community Roundtable session is coming next week on Wednesday, January 24, at noon Eastern time.
A while ago we published a blog on the easy conversion process to move from other MTA configs to KumoMTA. In this post,...
Today we are tagging our first release of the new year, ironically designated as version 2023-12-28. Our tags are based...
What is SMTP Smuggling? On September 18th there was a new exploit published regarding SMTP Smuggling, which you can...
Two of our founder, Mike and Tom, recently had to opportunity to be guests on The Future of Email podcast hosted by...
Today we are tagging our fall release, version 2023-11-28. You can Read The Changelog to get all the details, including...
In October 2023, Gmail and Yahoo announced that they would start enforcing factors that should already be common...
One of our goals when we created KumoMTA was to create a community for MailOps professionals, a group that has been...
In the past several months, we have contacted many people in the email industry for feedback and conversations about...
We were delighted to hook up with Dean Maidment and Ben Dyer from Taguchi Marketing last month for a lively discussion...
The title of this piece was the topic of much debate. There were so many gems to choose from.
Introduction One of our early design goals with KumoMTA was to ensure it was well-behaved. This means following the...
Way back in 1992, a friend handed me a set of floppy disks labelled “Linux Boot” and “Linux Root” and said, “You're a...
One of the Professional Services we offer at Kumo Corp is config conversion from an existing system to KumoMTA. This...
After talking to many high-volume senders, we know there is a common need to employ a tactic whereby messages are...
Getting started When we started talking about building an MTA, there were a couple of items we knew had to be top of...
Tl;Dr: As email moved from self-hosted to mailbox providers to white-label hosting with custom domains, both...
Um, what? What exactly is a Kumo, and why would you want one?
Introduction Today we're pleased to announce that KumoMTA is out of beta a full two months early!!
Over the years the MTA landscape has grown more sophisticated. In the beginning, Open-Source MTAs like Postfix and...
Introduction I was recently watching a live stream of the excellent Deliverability Summit conference in Prague and was...
Today's another major milestone in the evolution of KumoMTA with our release of Beta 2!