Attackers exploit misconfigured email routing and weak spoof protections to send internal-looking phishing emails for ...

Beware this highly sophisticated Microsoft 365 attack. Update, March 15, 2025: This story, originally published March 13, has been updated with further technical detail regarding the Microsoft 365 ...

Microsoft and Cloudflare teamed up to take down a notorious phishing service known as "RaccoonO365," the companies said this week. In a blog post, Microsoft said its Digital Crimes Unit used a court ...

Microsoft says its Defender for Office 365 cloud-based email security suite will now automatically detect and block email bombing attacks. Defender for Office 365 (formerly known as Office 365 ...