Microsoft introduced an Outlook DMARC email rejection rule, bouncing messages lacking DMARC records with the 550 5.7.1 authentication error. Related Posts: Apple Tightens macOS Full Disk Access in macOS 27.3 Google Firebase Studio Shutdown Set for March 2027 AMD Driver SSD Writes Spark Excessive Drive Wear Concerns The post Outlook DMARC Email Rejection Policy Bounces Unsigned Messages appeared first on Daily CyberSecurity.

NLnet Labs patched critical Unbound DNS vulnerabilities. Upgrade now to fix Unbound DNS vulnerabilities and block remote code execution attacks. Related Posts: Linux Kernel Vulnerabilities Exploited in the Wild Synology DSM Patches 8 Flaws, Two Critical Unauthenticated Critical HCL BigFix Vulnerabilities Expose Admin Accounts The post Unbound DNS Vulnerabilities Expose Resolvers to RCE appeared first on Daily CyberSecurity.