The founder
Built by someone who’s been protecting email since 1997
MailRoute is run by Thomas A. Johnson — founder of FrontBridge, acquired by Microsoft and still running today as Exchange Online Protection, and founder of MailRoute, the longest-running independent email protection service. Not a name on a slide deck. The person who built the category.
Origin story
From spam crisis to cloud pioneer
In 1997, Tom Johnson was running a web-hosting business that included free mailboxes for clients. He quickly found where all his time was going: not growing the business, not building useful tools — managing spam and viruses in those free mailboxes.
“I need to solve this spam and virus problem, or I’m going to be managing free mailboxes for a living.”
So he built a hosted email-filtering service instead: a proprietary network of servers that filtered inbound mail before it ever reached the customer. A cloud service before the industry had the word for it. The phrase “cloud computing” wouldn’t enter common use until around 2006; its earliest documented use traces to a 1996 Compaq memo — nearly a decade after Tom started building the real thing. Launched formally as Big Fish Communications in 2000, the company was later renamed FrontBridge Technologies.
Microsoft acquired FrontBridge in 2005. It became the foundation of Exchange Hosted Services — later Forefront Online Protection for Exchange, and now part of Exchange Online Protection, the email security layer in front of hundreds of millions of Office 365 mailboxes. It was one of Microsoft’s first cloud services.
Track record
Nearly three decades in email infrastructure
Tom’s career in email infrastructure didn’t start with FrontBridge. It started with the Internet itself.
Bought one of the first Mac 128Ks as a UCLA freshman. Started programming in 68K assembly, then C. That is what led to the Computer Science Department — and to the Internet.
Staff at the UCLA Computer Science Department — home of ARPANET Node #1 — working under Leonard Kleinrock, widely recognized as a father of the Internet. Ran internet infrastructure for the department and worked with Jon Postel at USC's Information Sciences Institute on early commercial Internet projects.
Left UCLA to rebuild the American Medical Association's online community, US HealthLink (later acquired by Medscape, now part of WebMD). Built an early search engine and an early distributed application — cloud computing, years before the industry had a name for it.
Started building hosted email filtering to solve his own spam-and-virus problem. Launched formally as Big Fish Communications in 2000, later renamed FrontBridge Technologies.
Founded MailRoute — self-financed, founder-led email protection for corporate, government, and educational customers. Still operating continuously, more than two decades later.
FrontBridge acquired by Microsoft. The core technology still runs inside Exchange Online Protection today.
Founded mxio to bring email authentication management to organizations of every size. Still building.
The pattern
The biggest players keep disappearing
Email filtering has a pattern: large companies acquire the category leaders, then let them atrophy.
Google acquired it in 2007, then discontinued it.
McAfee acquired it, then shut it down.
Symantec acquired it for $695M, then let it wither.
Microsoft acquired it in 2005. The core technology still runs inside Exchange Online Protection, largely unchanged — the rare survivor.
That’s why Tom founded MailRoute in 2003 — to keep continuity, independence, and steady investment in email protection, outside the acquisition cycle. Self-funded, founder-led, no outside investors waiting to flip it. MailRoute has protected email continuously for more than two decades while the acquired players came and went. The filtering platform doesn’t have to justify itself to a board every quarter, so it never gets starved — it just keeps getting better.
Nearly three decades. One problem.
From free-mailbox spam in 1997 to the threats organizations face today, it has been the same work the whole way through: keeping email safe and getting the good mail delivered. MailRoute is where that work lives independently — built and maintained by the person who has been doing it longer than almost anyone, and who isn’t done yet.
See what he built
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