Harmony Email and Collaboration is the modern evolution of email security that we trust to protect our most sensitive legal clients. If you have been in the IT space for a while, you may know this platform by its former name, Avanan. After Check Point acquired Avanan, the technology was integrated into the Check Point Harmony suite. Despite the name change, the core technology remains the industry leader for catching threats that skip past Microsoft 365 or Google Workspace. In this case study, we will explore how we used this platform to mitigate a live breach at a 60-user law firm and why the transition from Avanan to Check Point has only made the tool stronger.
The Challenge: A High-Stakes Law Firm Breach
Our client is a busy 60-user law firm that handles significant litigation and real estate transactions. Like many firms, they were a prime target for credential harvesting. A senior partner accidentally entered their credentials into a fake Microsoft login page that looked identical to the real thing. Within minutes, a cybercriminal had full control of the partner’s mailbox.
The attacker did not waste any time. They used the partner’s legitimate identity to send out a mass phishing campaign. Because the emails were coming from a trusted internal source, they were not flagged by the firm’s basic security settings. The criminal sent over 200 emails to both internal associates and external clients. These emails contained a malicious link to a “secure document” which was actually a trap to steal more credentials and potentially authorize fraudulent wire transfers.
Why Legacy Email Security Gateways Fail
Many business owners still rely on legacy email security gateways. These tools act like a filter that sits in front of your inbox. They check mail as it enters the “building.” However, once an attacker is inside a mailbox, they can send mail from one internal user to another without ever passing through that external gateway.
This is where the Avanan heritage of Harmony Email and Collaboration shines. Unlike older systems, this platform uses an API-based approach. It sits inside the cloud environment, which allows it to see every single email, even those sent between two people in the same office. In this law firm breach, a legacy gateway would have been completely blind to the attack.
The Instant Mitigation: Avanan Technology in Action
The moment the mass phishing attempt began, Harmony Email and Collaboration jumped into action. Because the platform uses Check Point’s massive global threat intelligence, it recognized several red flags that a human would have missed.
First, the system flagged an “Impossible Travel” alert. The attacker had logged in from a foreign IP address just seconds after the partner had logged in from their office in California. Second, the AI recognized that the partner was suddenly sending a high volume of emails containing a link that had never been seen before in the firm’s history.
The platform did not wait for an administrator to log in. It immediately took the following steps:
-
Automated Account Lockdown: The Check Point engine recognized the account takeover and instantly disabled the user’s ability to send further mail.
-
Internal Search and Destroy: The system performed a “reach back” across all 60 mailboxes. It automatically identified every instance of the phishing email and removed it from the recipients’ inboxes before they could even click the link.
-
Threat Analysis: It provided our team at SFV Cloud with a detailed report showing exactly which external clients had received the link so we could notify them immediately.
From Avanan to Check Point: A Stronger Defense
Some users were concerned when Check Point first acquired Avanan, but the results speak for themselves. The platform still features the lightning-fast API integration that made Avanan famous, but it is now backed by the massive resources of Check Point. This means the AI is trained on a much larger pool of data, allowing it to catch “zero-day” threats (brand new attacks) with incredible accuracy.
For our 60-user law firm, this meant the total duration of the breach was less than three minutes. No data was lost, no client funds were stolen, and the firm’s reputation remained intact. The associates did not even realize a breach had occurred until we notified them that the threat had already been neutralized.
Why Your Firm Needs Professional Email Security
If you are still searching for “Avanan” or “Check Point email security,” you are looking for the right thing. The threat landscape in 2026 is far too dangerous to rely on basic, built-in filters. Cybercriminals know that law firms are lucrative targets, and they are getting better at impersonating high-level partners.
As your MSP, SFV Cloud does not just “install” software. We manage the entire ecosystem. We monitor the alerts from Harmony Email and Collaboration around the clock. We ensure your SPF, DKIM, and DMARC records are perfect. We make sure that if a partner makes a mistake, the technology is there to catch them before it becomes a headline.
Is your email truly secure? Do not wait for a mass phishing event to find out. Contact SFV Cloud today for a full security audit and a demonstration of how Harmony Email and Collaboration can protect your firm from the inside out.