Aldine ISD Stops Sophisticated Email Attacks with Abnormal AI

Aldine Independent School District (ISD) is one of the largest school districts in Texas, serving approximately 52,000 students and employing 9,000 staff across unincorporated Harris County and portions of Houston. A longstanding partner of the Lone Star College System, Aldine has built an expansive K-12 education network supported by an enterprise technology infrastructure that connects classrooms, administrative offices, and operations across every campus.

The Aldine ISD Email Security Challenge

By 2022, sophisticated job scams were slipping past Aldine ISD's email filters and landing in student and staff inboxes. Threat actors built convincing replicas of the district's webpages and email signatures and used them to craft attacks even seasoned professionals fell for. Aldine's legacy API-based email security solution relied on brittle regex rules, blocking legitimate messages as often as malicious ones and pulling IT into endless quarantine reviews. Compromised accounts went undetected because Google offered little visibility into identity threats. User-reported messages required time-consuming and manual reviews from Kyle Pearston, the district's cybersecurity analyst, and graymail messages inundated staff inboxes and distracted from priority email. That's when Aldine ISD turned to Abnormal.

Customer Key Challenges:

• Sophisticated job scams bypassed legacy email filters and reached student and staff inboxes.
• Account compromises eluded Google security controls and visibility.
• IT lost hours reviewing suspicious email messages reported by users.

Abnormal Solution:

• Inbound Email Security blocks the advanced phishing and job scams that bypass Gmail's native defenses.
• Account Takeover Protection detects compromised accounts and locks attackers out automatically.
• AI Security Mailbox triages user-reported phishing while Email Productivity clears graymail from staff inboxes.

"Abnormal's integration with Google and the automation to remediate compromised accounts, especially when they're high-confidence cases, that's something that we love." — Kyle Pearston, Cybersecurity Analyst

The Abnormal AI Solution

Aldine ISD deployed the Abnormal Behavior Platform across Gmail, protecting all 39,500 mailboxes from the moment it went live. Rather than rely on regex rules and pattern matching, the platform analyzes every sender, recipient, and sign-in event across the district to build a behavioral baseline, then flags anomalies in real time. Inbound Email Security and Account Takeover Protection protect all mailflow and email accounts against advanced threats. AI Security Mailbox automates triage of user-reported messages, and Email Productivity manages graymail in the inbox. Because the deployment is API-native, coverage spans every user automatically without the per-user provisioning Pearston says left gaps in earlier tools.

Why Aldine ISD Chose Abnormal

Prior to switching email security solutions, Aldine ran a trial of Abnormal alongside Aldine's legacy solution and Google's native controls. Abnormal consistently surfaced the sophisticated attacks that bypassed both measures, giving Pearston the proof he needed to make the transition. Inbound Email Security now blocks the job scams and impersonation attacks that eluded previous defenses, stopping even business email compromise attacks that previously resulted in incidents. Account Takeover Protection has remediated 23 compromised accounts, catching the identity threats Google left invisible. AI Security Mailbox triages every user-reported message instantly, even during late hours or weekends, freeing Pearston from on-call alert fatigue.

Scaling Cleaner Inboxes Across Aldine

Aldine ISD's next phase is scaling Email Productivity district-wide, bringing a cleaner inbox experience to every staff and student mailbox. Pearston is taking the time to introduce the change carefully across 14 years of Gmail habits, leaning on Abnormal's onboarding videos to walk users through training the system. Quarterly business reviews with his customer success manager keep new improvements in front of him, and Pearston has become a regular voice among other school districts, sharing the value of the Abnormal and Aldine partnership.

"I believe in Abnormal and I love the upward trajectory… Every quarter they're meeting with me, showing me the QBR. They show me why it's working, the return on investment, the new improvements and what's coming. And it seems like every single time it's something exciting." — Kyle Pearston, Cybersecurity Analyst

Abnormal Products in Use:

• Inbound Email Security
• Account Takeover Protection
• AI Security Mailbox
• Email Productivity