When teams talk to us about moving their email infrastructure, the same handful of worries come up in almost every conversation, and they all deserve a straight answer. Your current platform probably carries years of custom routing, warm-up schedules, and workarounds your team has built up over time, and nobody wants to be the person who broke sending halfway through a migration.
Most of those worries, though, come from assumptions about how a migration works rather than from what happens during one. In this post, I've collected the nine myths we hear most often and grouped them into four themes, covering time and effort, cost, risk, and modernization. For each one, I'll walk through how it actually plays out when you move to Halon.
Time and effort
“The migration will take too long.”
Reality
You won't be doing it on your own. Halon's engineers work side by side with your team from the first configuration review through to the final cutover, which keeps the move from your existing platform smooth and a lot faster than most teams expect. Most Halon customers go live in under six months, and some in two to three months.
“Our team will need to become DevOps experts to run it.”
Reality
The WebUI and Delivery Insights tools let your operations team solve problems in a browser, without direct server access and without asking DevOps for help every time a configuration needs to change.
As of Halon 26.3, your team can also ask Halon questions in plain English. The new MCP integration connects the AI agents your team already uses to your Halon environment. Someone can ask “Why is mail to Gmail backing up?” or “Which IPs are in warm-up, and where are we seeing deferrals?” and get an answer that shows the evidence behind it.
Training is built into the plan, too. Getting your staff trained on every part of Halon is a standard milestone in every implementation, so nobody is left learning on the job after go-live.
“We'll have to rebuild all our custom logic from scratch.”
Reality
HSL, the Halon Scripting Language, is built for exactly this kind of work. Routing, filtering, and security rules can be defined, tested, and deployed in hours rather than weeks. If you're coming from Momentum, HSL will feel familiar, since it offers a scripting experience similar to Lua.
You also get some help along the way. Code Companion, Halon's AI assistant for HSL, helps your engineers write and adjust policy code as they go.
Cost
“It will cost more than what we pay now.”
Reality
Halon's savings show up over the long term, through faster implementation, faster time to resolution for delivery issues, and reduced customer churn. Where the biggest savings come from depends on where you're starting.
Risk
“There are too many technical risks.”
Reality
Every infrastructure has its quirks, and Halon's engineering team works hands-on with yours to map them out early. Because HSL is so flexible, the custom behavior your current setup has built up over the years can be carried over into Halon rather than left behind.
“Switching platforms will hurt our deliverability.”
Reality
Halon gives you more visibility into deliverability, not less. Delivery Guru classifies bounces automatically to protect your sender reputation, and Halon's dynamic queues let you control message flow by source IP, destination, tenant, or job, so you can ramp traffic up deliberately during the move.
“Halon won't handle our volume.”
Reality
Halon is built for the largest senders in the world. Its performance grows in step with the computing power you give it, so as your volume grows, Halon grows with you.
Modernization
“Moving to containers and the cloud is a massive project on its own.”
Reality
Halon is cloud-native from the start. Cloud Path lets it run in public clouds, private infrastructure, or Kubernetes clusters, which legacy platforms like PowerMTA and Momentum can't do. That means containerization comes with the migration instead of becoming a second project afterward.
“Staying on our current platform is the safer choice.”
Reality
Standing still has risks of its own, and they look a little different depending on what you're running today:
Swipe to see the full table
| Coming from | Where the savings come from |
|---|---|
A legacy platform |
Some are no longer actively developed, so every year the gap grows between your infrastructure and modern requirements like containerization and policy as code. |
A newer open-source MTA |
These are still maturing and often depend on highly specialized developers to keep them running, so free software can carry a high price. |
A lower-cost, server-based platform |
Supporting modern technologies like containers can mean difficult integrations. |
A cloud email service |
Per-message costs grow with every email you send, and you get less control over your sending stream and less visibility into your own data. |
Planning your move?
Our migration library has side-by-side guides for the most common starting points,
from on-prem MTAs to cloud email services.
FAQs
How long does it take to migrate to Halon?
Most Halon customers go live in under six months, and some in two to three months. Halon's engineers work alongside your team throughout, from configuration review to cutover.
Do I need to rewrite my existing email rules?
Your routing, filtering, and security logic moves into HSL, Halon's scripting language, where rules can be defined, tested, and deployed in hours. Code Companion, Halon's AI assistant for HSL, helps engineers write and adjust that code.
Will migrating my email infrastructure affect deliverability?
Dynamic queues let you control message flow by source IP, destination, tenant, or job, so you can ramp traffic deliberately. Delivery Guru classifies bounces automatically to help protect your sender reputation during and after the move.
Can Halon run in Kubernetes?
Yes. Halon is cloud-native, and Cloud Path lets it run in public clouds, private infrastructure, or Kubernetes clusters.