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Protect your customers’ email without giving up control

For mailbox providers, hosting providers, ISPs, and cloud email security providers: the teams running inbound email infrastructure for everyone else

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If you're running email for other people, you already know the job's gotten harder, and the stakes have gone up right along with it.

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Malicious email passes authentication now. AI has made phishing fluent and endlessly varied. A link that scanned clean at delivery can turn hostile hours later. And none of it hits your tenants evenly: your customers have different policies, requirements, and ideas of acceptable risk.

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Your customers still count on you to meet their requirements, keep email available, and stay ahead of what's new. Every manual workaround and unnecessary analysis step adds to the cost of delivering that service.

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When the service you sell depends on email, those pressures affect more than your security team. They affect your operating costs, the experience you deliver, and how quickly you can respond to what customers need next.

GUIDE

Nine shifts changing email operations for receivers


From authentication that passes while threats get through, to AI agents reading email on your users' behalf, this guide breaks down nine changes reshaping how receivers detect threats, enforce policy, and run the email infrastructure connecting them.
 
Each shift ends with practical questions your operations, security, and architecture teams can use to test whether today's setup is ready for what comes next.

Access the guide
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Trusted by world leading email security

group.one
KPN
Natro
Maskatel
1&1
WEB.DE
mail.de
group.one
KPN
Natro
Maskatel
1&1
WEB.DE
mail.de
group.one
KPN
Natro
Maskatel
1&1
WEB.DE
mail.de

We researched and evaluated many email security and delivery platforms against our requirements. We finally settled on the Halon email platform based on price performance, ease of use, flexibility, multitenancy support with security, and its ability to scale on demand.

Søren Visti Kristensen, Group.one

How Halon Helps receivers

How Halon helps receivers reduce risk

When you run email for multiple customers, you need protection that can keep up with changing threats, different requirements, and a growing service. Halon helps you:

  • Meet different customer requirements. Apply the policies and controls each customer needs across your receiving operation.
  • Stop new threats quickly. Detect spam, phishing, and malware as threats emerge.
  • Keep legitimate email flowing. Reduce false positives and the customer escalations they create.
  • Contain abuse. Act on compromised accounts and risky traffic before they affect the wider service.
  • Improve your service faster. Adapt policies, workflows, and integrations as customer needs change.
  • Reduce operational overhead. Spend less time maintaining fragmented systems and handling issues manually.

Case studies, guides, and industry insight

CASE STUDY

group.one x Halon

How group.one lowered the total cost of running its email operations.

View case study →

ARTICLE

Why jurisdiction matters for email threat detection

How the legal home of your detection engine shapes GDPR and cross-border risk.

View article →

ARTICLE

DKIM2: More context for mailbox providers

What receivers need in place to support DKIM2 at scale, from policy to safe rollout.

View article →

ARTICLE

Secure email gateways: a guide for service providers

What to evaluate when protecting email across customer environments.

View article →

CASE STUDY

KPN x Halon

Why the largest telecoms and IT service provider in the Netherlands chose Halon.

View article →

CASE STUDY

mail.de x Halon

How an email provider strengthened its threat detection with Halon Classify.

View article →

Let’s talk about your email environment


Every receiving operation has its own mix of customers, policies, and threats. We’ve worked with mailbox providers, ISPs, and hosting providers facing those same challenges, and we’d be happy to talk through yours.

Talk to our team about your receiving environment, policies, your secure email gateway, threat detection setup -you name it. Tell us what you’re trying to solve, and we’ll show you where Halon can help.