Halon for ESPs

Large-scale email delivery and powerful performance are critical for any email service provider. The Halon MTA provides exceptional flexible integration capabilities, outstanding reliability and performance, whilst being flexible to your scalability and growth.

Tailored to suit you

Fully scriptable, customizable and extensible, but lean and compact at the same time. A lack of flexibility in the MTA can lead to compromises and complexity, resulting in high maintenance costs and risks. The Halon MTA can be tailored to your specific needs with virtually unlimited customization. 


Security at its core

Security is in our DNA. The Halon MTA supports all the latest encryption and authentication standards whilst also allowing you to quickly implement and integrate existing and emerging standards for email authenticity such as DKIM signing, DMARC verification and ARC.


Why is Halon for You?

The Halon MTA gives ESP's a competitive edge with its powerful performance and endless list of features. Large-scale senders of transactional or marketing email need an MTA that enables them to develop great solutions in a highly-competitive market.

The Halon MTA gives ESP's full control, with unrivalled security features, deliverability automation and more.

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Deliverability automation
Throttles or suspends can be adjusted dynamically based on response patterns, bounces, queue metrics and much more. The Halon MTA is infinitely flexible to meet your needs with its scripting language.
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Granular throttling
Control concurrency and rate using any combination of parameters such as source IP, domain, MX, destination IP or other meta data.
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Powerful reporting
Get customised charts and counters for comprehensive delivery reporting and analysis using scriptable, clustered reporting.

Customer Cases



Headquartered in San Diego, California, USA, DuoCircle provides over 170,000 global customers with a next generation software platform. With a challenging legacy email structure, DuoCircle needed to migrate to a platform that provided a simple and easy to use format.


In Halon, we have found a great partner. They are not just delivering their software, but they’re really keen on working together. Halon is the most flexible, sophisticated and easy-to-manage MTA out there.

Martijn Thie, KPN