Emails SHALL be filtered by attachment file types.

Why This Matters

Email attachments remain a primary vector for malware delivery, including ransomware, worms, and trojans. Without filtering by file type, malicious executables and scripts can reach end users directly. For IT administrators, this is a critical defense layer to prevent initial compromise from weaponized attachments.

What Aether365 Checks

Aether365 verifies that your Microsoft 365 environment has a malware filter policy or transport rule configured to block or quarantine emails based on specific attachment file types. This check appears in the Aether365 dashboard under the microsoft-365 service category.