> For the complete documentation index, see [llms.txt](https://docs.material.security/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.material.security/whats-new/previous-releases/1.15-to-1.43/version-1.25.md).

# Version 1.25

This update enhances similarity matching (Auto Threat Hunt) controls, introduces new email security detections, refines existing detection rules to reduce false positives, unveils a major Simulations update, and includes some bug fixes.

### New ✨

* Add granular similarity matching controls to case details and settings. Material admins can dial in which attributes Material’s similarity matching engine uses to add emails to a case. This includes subject, sender, sender domain, and link.
* Email Security Detections
  * Detection for inbox rules that remove messages
  * NordVPN Impersonation
  * Detection for abuse of known open SMTP relays in extortion campaigns
  * Slack messages impersonating an org’s domain with confusable characters
  * Suspicious signatures containing recipient address

### Updated 🔧

* Simulations UI Overhaul
  * Redesigned for better clarity and usability, making it more intuitive and closer to Material’s update look and feel
  * Various bug fixes and performance improvements
* Email Security Detections
  * Lowered severity for inbox filters using sensitive terms
  * Improves rules for Hulu, Facebook, and Airtable impersonation to reduce false positives
  * Facebook Impersonation – tuned to catch billing domain abuse.
  * Adjustments to Webflow links, free subdomain hosts, and fake voicemail notifications to minimize false positives

### Fixed 🧹

* Accounts list filter not clearing


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