A Microsoft 365 RejectDirectSend bypass lets attackers spoof internal emails. Learn how this RejectDirectSend bypass works and how to protect your tenant. Related Posts: BlueMoon Exploit Kit Chains Chrome and Windows Zero-Days Trojanized Fake macOS Installers Spread OtterCookie Backdoor Attackers Use AI Tools to Hit Latin American Orgs The post Microsoft 365 RejectDirectSend Bypass Lets Attackers Spoof Internal Emails appeared first on Daily CyberSecurity.

Exchange Online blocking of outdated Exchange 2016 and 2019 servers begins in September 2026, requiring the October 2025 update baseline. Related Posts: Cloudflare Raises Workers Size Limit to 64 MiB for Free and Paid Plans Google Workspace Integrates Gemini Live Features GPT-6 Astra Updates Codex Pricing The post Exchange Online to Throttle and Block Outdated Exchange 2016 and 2019 Servers appeared first on Daily CyberSecurity.