email security

Microsoft has given a clear ultimatum to organizations still using the shared .onmicrosoft.com sending address: migrate to a verified custom domain or expect severe outbound throttling that will constrain external email to just 100 external recipients per organization in any 24‑hour rolling...

Microsoft is imposing a hard limit on outgoing email from free “.onmicrosoft.com” (MOERA) tenant domains to combat widespread abuse and protect delivery for legitimate Microsoft 365 customers, and the change — which takes effect in staged waves starting October 15, 2025 for trials — restricts...

Windows Live Mail’s built‑in spam controls — the Safety Options, Safe Senders/Recipients lists, Blocked Senders, international filters and message rules — can still give you effective inbox control, but only if you set them deliberately and understand their limits on modern Windows systems. This...

Microsoft’s security portal lists CVE-2025-25007 as a Microsoft Exchange Server spoofing vulnerability caused by improper validation of syntactic correctness of input, but public technical detail and third‑party analysis for this specific CVE remain sparse at the time of publication —...

A sweeping emergency order from the U.S. Cybersecurity and Infrastructure Security Agency (CISA) has intensified the cybersecurity spotlight on Microsoft Exchange, following the disclosure of a fresh and serious vulnerability. On August 7th, 2025, CISA issued Emergency Directive 25-02 in direct...

A new wave of highly sophisticated phishing scams has placed millions of Microsoft 365 users at increased risk, with recent campaigns focusing on colleges and universities such as Seton Hall. These scams exploit a deepening trust in digital communications and modern security tools, employing...

A new high-severity security vulnerability is causing alarm among businesses that utilize hybrid Microsoft Exchange deployments, as both Microsoft and the US Cybersecurity and Infrastructure Security Agency (CISA) issue urgent advisories. This flaw—affecting Exchange Server 2016, 2019, and the...

Threat actors have escalated their tactics by exploiting the Microsoft 365 Direct Send feature, fundamentally altering the landscape of email-based cyber attacks. As organizations increasingly rely on Microsoft 365 for critical communications, this emerging threat leverages a trusted service to...

Microsoft has unveiled its new AI-powered Phishing Triage Agent within Microsoft Defender, now available in public preview, marking a significant evolution in the way organizations approach email threat detection and response. As cyber threats continue to escalate in complexity and volume...

A high-severity security vulnerability has emerged at the heart of countless enterprise communications: Microsoft has issued a warning about a flaw in hybrid Exchange Server deployments that could give cyber attackers undetected escalated access to Exchange Online—potentially undermining the...

Cybersecurity in the corporate realm now sits at the top of IT agendas for organizations of all sizes, as email remains the most common vector for threats like phishing, ransomware, and sophisticated malware attachments. Microsoft Exchange Online Protection (EOP) has long held dominance due to...

A critical security update has emerged for organizations leveraging Microsoft Exchange Server in hybrid cloud environments, as CVE-2025-53786 exposes a significant elevation of privilege vulnerability. On April 18th, 2025, Microsoft not only published important security changes for hybrid...

A new wave of targeted phishing attacks is sweeping through organizations, exploiting a legitimate Microsoft 365 feature to wreak havoc from inside the trusted walls of enterprise email. Security researchers have recently uncovered threat actors using the Microsoft 365 “Direct Send” capability...

An alarming new wave of cybercrime has emerged, leveraging the very security tools designed to shield organizations from harm. Recent research reveals that phishing actors are now abusing link-wrapping and URL-rewriting services—trusted pillars of enterprise email protection—to sneak malicious...

In a significant move to bolster cyber resilience for Microsoft 365 users, Rubrik and Sophos have announced a strategic partnership aimed at delivering an integrated backup and recovery solution. This collaboration introduces "Sophos M365 Backup and Recovery Powered by Rubrik," marking the first...

Cybersecurity researchers have uncovered a sophisticated phishing campaign exploiting Microsoft 365's Direct Send feature to deliver internal-looking emails without authentication. This method allows attackers to bypass traditional email security measures, posing significant risks to...

Cybercriminals have ramped up efforts to exploit Microsoft 365’s Direct Send feature and unsecured SMTP relays, launching sophisticated phishing campaigns that masquerade as internal company emails—placing even vigilant organizations at substantial risk. According to recent research by...

A new wave of cyberattacks has exposed a dangerous flaw in trusted email security services, as hackers have successfully exploited protective link-wrapping features to orchestrate large-scale phishing campaigns targeting Microsoft 365 logins. By hijacking the mechanisms designed to keep users...

Cloudflare has issued a stark warning about a new and highly sophisticated wave of phishing attacks targeting Microsoft 365 users, drawing attention to a dangerous exploitation of a trusted email security feature: link wrapping. In recent weeks, both enterprise and consumer accounts have come...

A wave of highly sophisticated phishing attacks has put Microsoft 365 users—and the very foundations of modern email security—at risk, exposing a perilous paradox: the same technologies designed to protect cloud productivity platforms are now being systematically exploited to facilitate...