August 26, 2024 at 12:54PM Microsoft is investigating a false positive issue in Exchange Online, where emails with images are wrongly tagged as malicious and quarantined. The ongoing service degradation issue seems widespread, affecting outbound traffic, replies, and forwards of external emails. This is reminiscent of a past issue in October 2023. Microsoft is actively … Read more
May 9, 2024 at 02:01PM AT&T’s email servers are blocking connections from Microsoft 365 due to a “high volume” spam wave. Customers are unable to receive emails from Microsoft 365 addresses, leading to multiple complaints on AT&T forums. AT&T attributes the issue to spam originating from Microsoft’s servers and is collaborating with Microsoft to address … Read more
February 1, 2024 at 02:55PM Microsoft addressed a known issue causing connection failures for desktop and mobile email clients with Outlook.com accounts. They released service changes on January 31, 2024, addressing the authentication problem. Users experiencing sign-in problems reported issues on Microsoft’s community platforms. Additionally, Microsoft has resolved other past issues with Outlook.com, including client … Read more
November 7, 2023 at 12:08PM Microsoft has issued a warning to Outlook.com users about possible difficulties when sending emails with attachments. Error code 550 5.7.520 may appear, preventing emails from being sent. Microsoft suggests users upload files to OneDrive and share the link instead. Step-by-step instructions are provided as a workaround until the issue is … Read more