2004 – Firewall
A hardware firewall that included plugins from CYREN (then Comtouch) to scan and tag malicious email.
2008 – Email appliance
A hardware appliance that included the anti-spam functions from the firewall but also Kaspersky anti-virus and open-source solutions, such as the Postfix MTA.
2009/2010 – Virtualization / VM-ready
Halon goes from hardware to software and becomes the first email security product to be featured in the VMware marketplace.
2012 – Securityrouter
To solve the problems of firewalls being bad routers, and routers being bad at security, the Securityrouter OpenBSD-based firewall and router product combined the best of the two.
2014 – Hosted
Halon as a service was named Inumbo and made it possible for anyone to get a hosten spam prevention solution.