smtp relay security

About this tag
The smtp relay security tag covers threats and mitigations related to email relay abuse in Microsoft 365 environments. Recent discussions focus on the exploitation of Microsoft 365's Direct Send feature, which allows internal phishing attacks that bypass traditional security controls. This attack vector, highlighted by researchers like Proofpoint, enables threat actors to send convincing internal phishing emails by abusing the relay capabilities of the platform. Content under this tag addresses how CISOs and IT security teams can detect and prevent such exploits, emphasizing the need for enhanced monitoring and configuration hardening to protect enterprise communications. The tag is relevant for administrators and security professionals managing Microsoft 365 email infrastructure.

  1. Protecting Microsoft 365 from Internal Phishing via Direct Send Exploits

    Threat actors are increasingly exploiting Microsoft 365’s Direct Send feature to conduct highly convincing internal phishing campaigns, eroding trust within organizations and challenging the efficacy of traditional security defenses. This emergent attack vector, recently highlighted by...
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    • attack vector business email compromise cloud infrastructure cloud security cyber attack methods cyber threats cybersecurity direct send email security email spoofing email threats incident response legacy systems microsoft 365 security network security phishing relay attacks relay server security security security awareness security best practices smtp relay security spoofing supply chain security threat detection zero trust
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    • Forum: Windows News