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  • Halon Verified listing Verified listing

    The MTA for large-scale email services

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    • Company
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    About

    Halon develops email infrastructure and security software for businesses operating email services. Halon Engage serves email service providers, marketing technology platforms and other large senders. Halon Protect provides inbound protection and outbound abuse prevention for service providers.

    Halon Classify detects and categorises spam, phishing and malware. The company was founded in Sweden in 2010. Its headquarters are in Göteborg, Sweden, and it publishes offices in Berlin and San Francisco. Its documentation covers configuration, scripting and email operations.

    Company informationView company information →
    • Website
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    Facts

    Tags

    • API
    • Automation
    • White Label

    Categories

    • Mail Transfer Agent (MTA)
    • Security

    Software Type

    • On-Premise

    Supported Languages

    • English

    Certification & Memberships

    • CSA
    • M3AAWG
    • Emailexpert

    Related

    Products & Services3

    SoftwareHalon Protect

    Halon Protect is email infrastructure and security software for service providers. It combines inbound protection with outbound abuse prevention in existing mail…

    View profile →
    SoftwareHalon Classify

    Halon Classify is an email threat detection and classification engine for service providers and enterprises. It identifies spam, phishing and malware and…

    View profile →
    SoftwareHalon Engage

    Halon Engage is email infrastructure software for email service providers, marketing technology platforms and businesses sending at scale. It supports programmable email…

    View profile →

    Memberships3

    Verified from cited rosters or confirmed directly by the membership organisation.

    OrganisationsemailexpertEnterprise Member

    the inclusive email community covering deliverability, security, anti-spam & marketing since 2008 expert vendors, agencies & consultants. Emailexpert is both an email…

    View profile →

    Confirmed by emailexpert. Checked 27 September 2026.

    OrganisationsM3AAWGSupporter

    M3AAWG is a global industry association working on internet abuse. Its members include communications providers, hosting companies, security vendors, email service providers…

    View profile →

    Membership checked 4 October 2026. Official roster

    OrganisationsCertified Senders Alliance (CSA)Spam filter provider

    The Certified Senders Alliance is a service operated by eco, the Association of the Internet Industry, in cooperation with the German Dialogue…

    View profile →

    Roster entry: Halon. Checked 4 October 2026. Official roster

    Activity

    emailexpert coverage

    Industry News 18 September 2026 · emailexpert

    At least eight arguments, two stages, one church: what to expect at the London Forum

    emailexpert Forum comes to London for the first time on 16 and 17 November. Around 250 people, a Grade I listed church in Marylebone, and a programme designed…

    Products & Markets 18 September 2026 · emailexpert

    Halon Adds DKIM2 Code and Publishes New Infrastructure Guidance

    Halon has released experimental DKIM2 signing and verification for Halon Engage and Halon Protect. The code arrived on 26 August as an open-source module, halon-extras-dkim2, installed from Halon's…

    Read more coverage

    Company updates

    • Is your email platform a secret superspreader? Posted 13 October 2026 | 5:53 pm
    • Four ways to build email resilience for high-growth businesses Posted 8 October 2026 | 1:54 pm
    • 12 things to look for in your next SMTP relay service Posted 1 October 2026 | 7:52 pm
    • Introducing: Seven operational tests for your email infrastructure Posted 30 September 2026 | 9:50 pm

    Contact & locations

    Location

    • Listed location
      Lilla Bommen 3, 411 04 Göteborg, Sweden

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    • Listed location
      100 Montgomery Street, San Francisco, California 94104, United States

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    Map

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    Contact details

    • Address
      Lilla Bommen 3
    • Phone Number
      +46 31 301 19 20
    • Website
      Visit Site

    Integrations

    Sophos
    dmarcian
    Cloudmark
    Vade Secure
    Spamhaus
    Abusix

    Company details

    • Company Type
      Private
    • Legal Name
      Halon Security AB & Halon Security Inc.
    • Year founded
      2010
    • Employees
      51–200

    News & coverage

    30 related stories

    Industry News 18 September 2026 · emailexpert

    At least eight arguments, two stages, one church: what to expect at the London Forum

    emailexpert Forum comes to London for the first time on 16 and 17 November. Around 250 people, a Grade I listed church in Marylebone, and a programme designed…

    Products & Markets 18 September 2026 · emailexpert

    Halon Adds DKIM2 Code and Publishes New Infrastructure Guidance

    Halon has released experimental DKIM2 signing and verification for Halon Engage and Halon Protect. The code arrived on 26 August as an open-source module, halon-extras-dkim2, installed from Halon's…

    Products & Markets 2 July 2026 · emailexpert

    Halon Adds DMARCbis and Post-Quantum TLS Support

    Halon has shipped RFC 9989 support across Protect and Engage, three weeks after the updated DMARC standard was published. The releases also add post-quantum STARTTLS, Arm64 builds and…

    Industry News 16 June 2026 · emailexpert

    MTA Corner: What the Engine Rooms Shipped This Spring

    A roundup of recent releases from the MTA vendors in our membership. Less glamorous than AI agents, more load-bearing than almost anything else we cover. While the industry…

    Products & Markets 13 February 2026 · emailexpert

    Halon Accelerates Growth and Invests Further in R&D with Expanded Focus on Halon Classify

    Halon, a leading provider of composable email infrastructure and security solutions, continues its growth trajectory with a renewed commitment to innovation and product development following its recent acquisition…

    Executive Appointments 19 January 2026 · emailexpert

    Halon Appoints Chris Rowe as Director of Sales – Security

    Halon, has hired Chris Rowe to head up sales for its security products. Rowe has spent most of his career in cybersecurity and SaaS sales. He recently ran…

    Events 9 January 2026 · emailexpert

    Halon Returns as Platinum Sponsor of Deliverability Summit 2026

    Halon, a global leader in composable email infrastructure, is returning as a Platinum Sponsor and official event partner for Deliverability Summit 2026, taking place in Barcelona from 20–22…

    Partnerships 29 December 2025 · emailexpert

    Halon Extends Five-Year Partnership with Emailexpert

    Halon renews its Emailexpert Enterprise Membership, driving global email innovation, security, and community growth.

    Products & Markets 5 December 2025 · emailexpert

    Halon Protect 17 Released: What Changed and What to Know

    On December 4, 2025, Halon released Halon Protect 17, the latest version of its inbound email security platform. The update focuses on improving protection against malicious email, simplifying…

    Industry News 5 December 2025 · emailexpert

    Halon Engage 17 Released: Key Updates and Changes

    Halon released Halon Engage 17 on December 4, 2025. This is the latest version of its email platform, focusing on abuse prevention, operational improvements, and security updates. What’s…

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