CP
cyberpings
Cloud SecurityMEDIUM

Microsoft Outlook - Investigates Email Delivery Problems

Featured image for Microsoft Outlook - Investigates Email Delivery Problems
BCBleepingComputer
OutlookMicrosoft 365Email DeliveryNDR ErrorExchange
🎯

Basically, some Outlook users can't send emails due to a technical issue.

Quick Summary

Microsoft is investigating email delivery issues affecting Classic Outlook users. Some users linked to Exchange accounts are unable to send emails. Workarounds are available while a fix is in progress.

What Happened

Microsoft has identified a significant issue affecting Classic Outlook users, particularly those utilizing Outlook.com. Many users are experiencing problems when trying to send emails, leading to frustrating non-delivery reports (NDRs). The error message states, "You do not have permission to send the message on behalf of the specified user," indicating a permissions problem that can arise under specific conditions.

Who's Affected

This issue primarily impacts users whose Outlook.com accounts are linked to other Exchange accounts. Affected users are receiving notifications that their emails have not reached intended recipients, which can be particularly disruptive for professionals relying on email for communication.

What Data Was Exposed

While no personal data has been exposed in this situation, the inability to send emails can hinder communication and workflow, leading to potential delays in business operations. The NDR error code, specifically 0x80070005-0x0004dc-0x000524, highlights the technical nature of the problem.

What You Should Do

Microsoft is actively investigating the issue and has provided several workarounds for affected users:

  • Remove the M365 account Address Book: This prevents the Outlook client from checking it when sending emails.
  • Hide the Outlook.com contact from the Microsoft 365 account Global Address List (GAL).
  • Create a new Classic Outlook profile that includes only the account experiencing NDR errors.
  • Use alternative methods: Consider using the New Outlook client or accessing Outlook.com via the web to send emails from the affected account.

In addition to this issue, Microsoft has recently addressed other bugs, including crashes related to the Microsoft Teams Meeting Add-in and synchronization errors with Gmail and Yahoo accounts. They continue to investigate further issues that affect user experience in Classic Outlook and other Microsoft 365 applications.

By staying informed and utilizing the recommended workarounds, users can mitigate the impact of this email delivery problem while Microsoft works toward a permanent solution.

🔒 Pro insight: The interplay between Outlook profiles and Exchange accounts highlights the complexities of cloud-based email systems, necessitating careful management of user permissions.

Original article from

BCBleepingComputer· Sergiu Gatlan
Read Full Article

Share

Related Pings

MEDIUMCloud Security

Microsoft Exchange Online - High Volume Email Feature Launched

Microsoft has launched High Volume Email for Exchange Online, addressing the need for sending large volumes of automated messages. This feature enhances internal communications while maintaining security. Organizations can now streamline their messaging without hitting previous limits.

Help Net Security·
HIGHCloud Security

Windows Secure Boot - Falcon IT Enhances Certificate Management

CrowdStrike's Falcon for IT is now equipped to manage the transition to the new Windows Secure Boot certificate. This change impacts all Secure Boot-enabled devices, ensuring compliance and security updates. IT teams must act to avoid operational risks and maintain security integrity.

CrowdStrike Blog·
HIGHCloud Security

AWS Environments Targeted by TeamPCP in Major Attack

TeamPCP has targeted AWS environments, exploiting stolen credentials from supply chain attacks. This raises serious concerns for cloud security and data protection. Organizations must act quickly to safeguard their resources.

SC Media·
HIGHCloud Security

TeamPCP Breaches Cloud - Quick Attacks on SaaS Instances

TeamPCP has launched quick attacks on cloud services using stolen credentials. Organizations must act fast to secure their accounts and protect sensitive data. Time is of the essence in combating these breaches.

Dark Reading·
MEDIUMCloud Security

Supply Chain Risk Management - Essential Policies Explained

Supply chain risk management is critical for cybersecurity. Organizations must implement effective policies to safeguard their systems against external threats. This proactive approach ensures compliance and security.

Canadian Cyber Centre News·
HIGHCloud Security

Red Hat Reports Widespread Cloud Security Incidents

A Red Hat survey reveals that 97% of organizations faced cloud security incidents last year. Misconfigurations and unauthorized access are among the top issues. Companies must enhance their security strategies to protect sensitive data.

SC Media·